<?php
/*
 pChart - a PHP class to build charts!
 Copyright (C) 2008 Jean-Damien POGOLOTTI
 Version  1.27d last updated on 09/30/08

 http://pchart.sourceforge.net

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 1,2,3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.

 Class initialisation :
 pChart($XSize,$YSize)
 Draw methods :
 drawBackground($R,$G,$B)
 drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B)
 drawFilledRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B,$DrawBorder=TRUE,$Alpha=100)
 drawRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
 drawFilledRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
 drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
 drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
 drawEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
 drawFilledEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
 drawLine($X1,$Y1,$X2,$Y2,$R,$G,$B,$GraphFunction=FALSE)
 drawDottedLine($X1,$Y1,$X2,$Y2,$DotSize,$R,$G,$B)
 drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B)
 drawFromPNG($FileName,$X,$Y,$Alpha=100)
 drawFromGIF($FileName,$X,$Y,$Alpha=100)
 drawFromJPG($FileName,$X,$Y,$Alpha=100)
 Graph setup methods :
 addBorder($Width=3,$R=0,$G=0,$B=0)
 clearScale()
 clearShadow()
 createColorGradientPalette($R1,$G1,$B1,$R2,$G2,$B2,$Shades)
 drawGraphArea($R,$G,$B,$Stripe=FALSE)
 drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1,$RightScale=FALSE)
 drawRightScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1)
 drawXYScale($Data,$DataDescription,$YSerieName,$XSerieName,$R,$G,$B,$WithMargin=0,$Angle=0,$Decimals=1)
 drawGrid($LineWidth,$Mosaic=TRUE,$R=220,$G=220,$B=220,$Alpha=100)
 drawLegend($XPos,$YPos,$DataDescription,$R,$G,$B,$Rs=-1,$Gs=-1,$Bs=-1,$Rt=0,$Gt=0,$Bt=0,$Border=FALSE)
 drawPieLegend($XPos,$YPos,$Data,$DataDescription,$R,$G,$B)
 drawTitle($XPos,$YPos,$Value,$R,$G,$B,$XPos2=-1,$YPos2=-1,$Shadow=FALSE)
 drawTreshold($Value,$R,$G,$B,$ShowLabel=FALSE,$ShowOnRight=FALSE,$TickWidth=4,$FreeText=NULL)
 drawArea($Data,$Serie1,$Serie2,$R,$G,$B,$Alpha = 50)
 drawRadarAxis($Data,$DataDescription,$Mosaic=TRUE,$BorderOffset=10,$A_R=60,$A_G=60,$A_B=60,$S_R=200,$S_G=200,$S_B=200,$MaxValue=-1)
 drawGraphAreaGradient($R,$G,$B,$Decay,$Target=TARGET_GRAPHAREA)
 drawTextBox($X1,$Y1,$X2,$Y2,$Text,$Angle=0,$R=255,$G=255,$B=255,$Align=ALIGN_LEFT,$Shadow=TRUE,$BgR=-1,$BgG=-1,$BgB=-1,$Alpha=100)
 getLegendBoxSize($DataDescription)
 loadColorPalette($FileName,$Delimiter=",")
 reportWarnings($Interface="CLI")
 setGraphArea($X1,$Y1,$X2,$Y2)
 setLabel($Data,$DataDescription,$SerieName,$ValueName,$Caption,$R=210,$G=210,$B=210)
 setColorPalette($ID,$R,$G,$B)
 setCurrency($Currency)
 setDateFormat($Format)
 setFontProperties($FontName,$FontSize)
 setLineStyle($Width=1,$DotSize=0)
 setFixedScale($VMin,$VMax,$Divisions=5,$VXMin=0,$VXMin=0,$XDivisions=5)
 setShadowProperties($XDistance=1,$YDistance=1,$R=60,$G=60,$B=60,$Alpha)
 writeValues($Data,$DataDescription,$Series)
 Graphs methods :
 drawPlotGraph($Data,$DataDescription,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=FALSE)
 drawXYPlotGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1)
 drawLineGraph($Data,$DataDescription,$SerieName="")
 drawXYGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0)
 drawFilledLineGraph($Data,$DataDescription,$Alpha=100,$AroundZero=FALSE)
 drawCubicCurve($Data,$DataDescription,$Accuracy=.1,$SerieName="")
 drawFilledCubicCurve($Data,$DataDescription,$Accuracy=.1,$Alpha=100,$AroundZero=FALSE)
 drawOverlayBarGraph($Data,$DataDescription,$Alpha=50)
 drawBarGraph($Data,$DataDescription,$Shadow=FALSE)
 drawStackedBarGraph($Data,$DataDescription,$Alpha=50,$Contiguous=FALSE)
 drawLimitsGraph($Data,$DataDescription,$R=0,$G=0,$B=0)
 drawRadar($Data,$DataDescription,$BorderOffset=10,$MaxValue=-1)
 drawFilledRadar($Data,$DataDescription,$Alpha=50,$BorderOffset=10,$MaxValue=-1)
 drawBasicPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$R=255,$G=255,$B=255,$Decimals=0)
 drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals = 0)
 drawFlatPieGraphWithShadow($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals = 0)
 drawPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$EnhanceColors=TRUE,$Skew=60,$SpliceHeight=20,$SpliceDistance=0,$Decimals=0)
 Other methods :
 setImageMap($Mode=TRUE,$GraphID="MyGraph")
 getImageMap($MapName,$Flush=TRUE)
 Render($FileName)
 Stroke()
 */

/* Declare some script wide constants */
define('SCALE_NORMAL',1);
define('SCALE_ADDALL',2);
define('SCALE_START0',3);
define('SCALE_ADDALLSTART0',4);
define('PIE_PERCENTAGE', 1);
define('PIE_LABELS',2);
define('PIE_NOLABEL',3);
define('PIE_PERCENTAGE_LABEL', 4);
define('TARGET_GRAPHAREA',1);
define('TARGET_BACKGROUND',2);
define('ALIGN_TOP_LEFT',1);
define('ALIGN_TOP_CENTER',2);
define('ALIGN_TOP_RIGHT',3);
define('ALIGN_LEFT',4);
define('ALIGN_CENTER',5);
define('ALIGN_RIGHT',6);
define('ALIGN_BOTTOM_LEFT',7);
define('ALIGN_BOTTOM_CENTER',8);
define('ALIGN_BOTTOM_RIGHT',9);

/* pChart class definition */
class pChart
{
    /* Palettes definition */
    var $Palette = array('0'=>array('R'=>188,'G'=>224,'B'=>46),
                        '1'=>array('R'=>224,'G'=>100,'B'=>46),
                        '2'=>array('R'=>224,'G'=>214,'B'=>46),
                        '3'=>array('R'=>46,'G'=>151,'B'=>224),
                        '4'=>array('R'=>176,'G'=>46,'B'=>224),
                        '5'=>array('R'=>224,'G'=>46,'B'=>117),
                        '6'=>array('R'=>92,'G'=>224,'B'=>46),
                        '7'=>array('R'=>224,'G'=>176,'B'=>46),
                        '8'=>array('R'=>224,'G'=>100,'B'=>46),
                        '9'=>array('R'=>224,'G'=>176,'B'=>46)

    );

    /* Some static vars used in the class */
    var $XSize          = NULL;
    var $YSize          = NULL;
    var $Picture        = NULL;
    var $ImageMap       = NULL;

    /* Error management */
    var $ErrorReporting = FALSE;
    var $ErrorInterface = 'CLI';
    var $Errors         = NULL;
    var $ErrorFontName  = 'Fonts/pf_arma_five.ttf';
    var $ErrorFontSize  = 6;

    /* vars related to the graphing area */
    var $GArea_X1        = NULL;
    var $GArea_Y1        = NULL;
    var $GArea_X2        = NULL;
    var $GArea_Y2        = NULL;
    var $GAreaXOffset    = NULL;
    var $VMax            = NULL;
    var $VMin            = NULL;
    var $VXMax           = NULL;
    var $VXMin           = NULL;
    var $Divisions       = NULL;
    var $XDivisions      = NULL;
    var $DivisionHeight  = NULL;
    var $XDivisionHeight = NULL;
    var $DivisionCount   = NULL;
    var $XDivisionCount  = NULL;
    var $DivisionRatio   = NULL;
    var $XDivisionRatio  = NULL;
    var $DivisionWidth   = NULL;
    var $DataCount       = NULL;
    var $Currency        = '$';

    /* Text format related vars */
    var $FontName       = NULL;
    var $FontSize       = NULL;
    var $DateFormat     = 'd/m/Y';

    /* Lines format related vars */
    var $LineWidth      = 1;
    var $LineDotSize    = 0;

    /* Layer related vars */
    var $Layers         = NULL;

    /* Set antialias quality : 0 is maximum, 100 minimum*/
    var $AntialiasQuality = 0;

    /* Shadow settings */
    var $ShadowActive    = FALSE;
    var $ShadowXDistance = 1;
    var $ShadowYDistance = 1;
    var $ShadowRColor    = 60;
    var $ShadowGColor    = 60;
    var $ShadowBColor    = 60;
    var $ShadowAlpha     = 50;
    var $ShadowBlur      = 0;

    /* Image Map settings */
    var $BuildMap         = FALSE;
    var $MapFunction      = NULL;
    var $tmpFolder        = 'tmp/';
    var $MapID            = NULL;

    /* This function create the background picture */
    function pChart($XSize,$YSize)
    {
        $this->XSize   = $XSize;
        $this->YSize   = $YSize;
        $this->Picture = imagecreatetruecolor($XSize,$YSize);

        $C_White =$this->AllocateColor($this->Picture,255,255,255);
        imagefilledrectangle($this->Picture,0,0,$XSize,$YSize,$C_White);
        imagecolortransparent($this->Picture,$C_White);

        $this->setFontProperties('tahoma.ttf',8);
    }

    /* Set if warnings should be reported */
    function reportWarnings($Interface='CLI')
    {
        $this->ErrorReporting = TRUE;
        $this->ErrorInterface = $Interface;
    }

    /* Set the font properties */
    function setFontProperties($FontName,$FontSize)
    {
        $this->FontName = $FontName;
        $this->FontSize = $FontSize;
    }

    /* Set the shadow properties */
    function setShadowProperties($XDistance=1,$YDistance=1,$R=60,$G=60,$B=60,$Alpha=50,$Blur=0)
    {
        $this->ShadowActive    = TRUE;
        $this->ShadowXDistance = $XDistance;
        $this->ShadowYDistance = $YDistance;
        $this->ShadowRColor    = $R;
        $this->ShadowGColor    = $G;
        $this->ShadowBColor    = $B;
        $this->ShadowAlpha     = $Alpha;
        $this->ShadowBlur      = $Blur;
    }

    /* Remove shadow option */
    function clearShadow()
    {
        $this->ShadowActive = FALSE;
    }

    /* Set Palette color */
    function setColorPalette($ID,$R,$G,$B)
    {
        if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
        if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
        if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

        $this->Palette[$ID]['R'] = $R;
        $this->Palette[$ID]['G'] = $G;
        $this->Palette[$ID]['B'] = $B;
    }

    /* Create a color palette shading from one color to another */
    function createColorGradientPalette($R1,$G1,$B1,$R2,$G2,$B2,$Shades)
    {
        $RFactor = ($R2-$R1)/$Shades;
        $GFactor = ($G2-$G1)/$Shades;
        $BFactor = ($B2-$B1)/$Shades;

        for($i=0;$i<=$Shades-1;$i++)
        {
            $this->Palette[$i]['R'] = $R1+$RFactor*$i;
            $this->Palette[$i]['G'] = $G1+$GFactor*$i;
            $this->Palette[$i]['B'] = $B1+$BFactor*$i;
        }
    }

    /* Load Color Palette from file */
    function loadColorPalette($FileName,$Delimiter=',')
    {
        $handle  = @fopen($FileName,'r');
        $ColorID = 0;
        if ($handle)
        {
            while (!feof($handle))
            {
                $buffer = fgets($handle, 4096);
                $buffer = str_replace(chr(10),'',$buffer);
                $buffer = str_replace(chr(13),'',$buffer);
                $Values = split($Delimiter,$buffer);
                if ( count($Values) == 3 )
                {
                    $this->Palette[$ColorID]['R'] = $Values[0];
                    $this->Palette[$ColorID]['G'] = $Values[1];
                    $this->Palette[$ColorID]['B'] = $Values[2];
                    $ColorID++;
                }
            }
            for($i = 0; $i < $ColorID; $i++)
            {
                $this->Palette[$ColorID + $i]['R'] = $this->Palette[$i]['R'];
                $this->Palette[$ColorID + $i]['G'] = $this->Palette[$i]['G'];
                $this->Palette[$ColorID + $i]['B'] = $this->Palette[$i]['B'];
            }//for
        }
    }

    /* Set line style */
    function setLineStyle($Width=1,$DotSize=0)
    {
        $this->LineWidth   = $Width;
        $this->LineDotSize = $DotSize;
    }

    /* Set currency symbol */
    function setCurrency($Currency)
    {
        $this->Currency = $Currency;
    }

    /* Set the graph area location */
    function setGraphArea($X1,$Y1,$X2,$Y2)
    {
        $this->GArea_X1 = $X1;
        $this->GArea_Y1 = $Y1;
        $this->GArea_X2 = $X2;
        $this->GArea_Y2 = $Y2;
    }

    /* Prepare the graph area */
    function drawGraphArea($R,$G,$B,$Stripe=FALSE)
    {
        $this->drawFilledRectangle($this->GArea_X1,$this->GArea_Y1,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B,FALSE);
        $this->drawRectangle($this->GArea_X1,$this->GArea_Y1,$this->GArea_X2,$this->GArea_Y2,$R-40,$G-40,$B-40);

        if ( $Stripe )
        {
            $R2 = $R-15; if ( $R2 < 0 ) { $R2 = 0; }
            $G2 = $R-15; if ( $G2 < 0 ) { $G2 = 0; }
            $B2 = $R-15; if ( $B2 < 0 ) { $B2 = 0; }

            $LineColor =$this->AllocateColor($this->Picture,$R2,$G2,$B2);
            $SkewWidth = $this->GArea_Y2-$this->GArea_Y1-1;

            for($i=$this->GArea_X1-$SkewWidth;$i<=$this->GArea_X2;$i=$i+4)
            {
                $X1 = $i;            $Y1 = $this->GArea_Y2;
                $X2 = $i+$SkewWidth; $Y2 = $this->GArea_Y1;


                if ( $X1 < $this->GArea_X1 )
                { $X1 = $this->GArea_X1; $Y1 = $this->GArea_Y1 + $X2 - $this->GArea_X1 + 1; }

                if ( $X2 >= $this->GArea_X2 )
                { $Y2 = $this->GArea_Y1 + $X2 - $this->GArea_X2 +1; $X2 = $this->GArea_X2 - 1; }
                // * Fixed in 1.27 *         { $X2 = $this->GArea_X2 - 1; $Y2 = $this->GArea_Y2 - ($this->GArea_X2 - $X1); }

                imageline($this->Picture,$X1,$Y1,$X2,$Y2+1,$LineColor);
            }
        }
    }

    /* Allow you to clear the scale : used if drawing multiple charts */
    function clearScale()
    {
        $this->VMin       = NULL;
        $this->VMax       = NULL;
        $this->VXMin      = NULL;
        $this->VXMax      = NULL;
        $this->Divisions  = NULL;
        $this->XDivisions = NULL;    }

        /* Allow you to fix the scale, use this to bypass the automatic scaling */
        function setFixedScale($VMin,$VMax,$Divisions=5,$VXMin=0,$VXMax=0,$XDivisions=5)
        {
            $this->VMin      = $VMin;
            $this->VMax      = $VMax;
            $this->Divisions = $Divisions;

            if ( !$VXMin == 0 )
            {
                $this->VXMin      = $VXMin;
                $this->VXMax      = $VXMax;
                $this->XDivisions = $XDivisions;
            }
        }

        /* Wrapper to the drawScale() function allowing a second scale to be drawn */
        function drawRightScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1)
        {
            $this->drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks,$Angle,$Decimals,$WithMargin,$SkipLabels,TRUE);
        }

        /* Compute and draw the scale */
        function drawScale($Data,$DataDescription,$ScaleMode,$R,$G,$B,$DrawTicks=TRUE,$Angle=0,$Decimals=1,$WithMargin=FALSE,$SkipLabels=1,$RightScale=FALSE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateData('drawScale',$Data);

            $C_TextColor         =$this->AllocateColor($this->Picture,$R,$G,$B);

            $this->drawLine($this->GArea_X1,$this->GArea_Y1,$this->GArea_X1,$this->GArea_Y2,$R,$G,$B);
            $this->drawLine($this->GArea_X1,$this->GArea_Y2,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B);

            if ( $this->VMin == NULL && $this->VMax == NULL)
            {
                if (isset($DataDescription['Values'][0]))
                {
                    $this->VMin = $Data[0][$DataDescription['Values'][0]];
                    $this->VMax = $Data[0][$DataDescription['Values'][0]];
                }
                else { $this->VMin = 2147483647; $this->VMax = -2147483647; }

                /* Compute Min and Max values */
                if ( $ScaleMode == SCALE_NORMAL || $ScaleMode == SCALE_START0 )
                {
                    if ( $ScaleMode == SCALE_START0 ) { $this->VMin = 0; }

                    foreach ( $Data as $Key => $Values )
                    {
                        foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                        {
                            if (isset($Data[$Key][$ColName]))
                            {
                                $Value = $Data[$Key][$ColName];

                                if ( is_numeric($Value) )
                                {
                                    if ( $this->VMax < $Value) { $this->VMax = $Value; }
                                    if ( $this->VMin > $Value) { $this->VMin = $Value; }
                                }
                            }
                        }
                    }
                }
                elseif ( $ScaleMode == SCALE_ADDALL || $ScaleMode == SCALE_ADDALLSTART0 ) /* Experimental */
                {
                    if ( $ScaleMode == SCALE_ADDALLSTART0 ) { $this->VMin = 0; }

                    foreach ( $Data as $Key => $Values )
                    {
                        $Sum = 0;
                        foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                        {
                            if (isset($Data[$Key][$ColName]))
                            {
                                $Value = $Data[$Key][$ColName];
                                if ( is_numeric($Value) )
                                $Sum  += $Value;
                            }
                        }
                        if ( $this->VMax < $Sum) { $this->VMax = $Sum; }
                        if ( $this->VMin > $Sum) { $this->VMin = $Sum; }
                    }
                }

                if ( $this->VMax > preg_replace('/\.[0-9]+/','',$this->VMax) )
                $this->VMax = preg_replace('/\.[0-9]+/','',$this->VMax)+1;

                /* If all values are the same */
                if ( $this->VMax == $this->VMin )
                {
                    if ( $this->VMax >= 0 ) { $this->VMax++; }
                    else { $this->VMin--; }
                }

                $DataRange = $this->VMax - $this->VMin;
                if ( $DataRange == 0 ) { $DataRange = .1; }

                /* Compute automatic scaling */
                $ScaleOk = FALSE; $Factor = 1;
                $MinDivHeight = 25; $MaxDivs = ($this->GArea_Y2 - $this->GArea_Y1) / $MinDivHeight;

                if ( $this->VMin == 0 && $this->VMax == 0 )
                { $this->VMin = 0; $this->VMax = 2; $Scale = 1; $Divisions = 2;}
                elseif ($MaxDivs > 1)
                {
                    while(!$ScaleOk)
                    {
                        $Scale1 = ( $this->VMax - $this->VMin ) / $Factor;
                        $Scale2 = ( $this->VMax - $this->VMin ) / $Factor / 2;
                        $Scale4 = ( $this->VMax - $this->VMin ) / $Factor / 4;

                        if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale1); $Scale = 1;}
                        if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale2); $Scale = 2;}
                        if (!$ScaleOk)
                        {
                            if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
                            if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
                        }
                    }

                    if ( floor($this->VMax / $Scale / $Factor) != $this->VMax / $Scale / $Factor)
                    {
                        $GridID     = floor ( $this->VMax / $Scale / $Factor) + 1;
                        $this->VMax = $GridID * $Scale * $Factor;
                        $Divisions++;
                    }

                    if ( floor($this->VMin / $Scale / $Factor) != $this->VMin / $Scale / $Factor)
                    {
                        $GridID     = floor( $this->VMin / $Scale / $Factor);
                        $this->VMin = $GridID * $Scale * $Factor;
                        $Divisions++;
                    }
                }
                else /* Can occurs for small graphs */
                $Scale = 1;

                if ( !isset($Divisions) )
                $Divisions = 2;

                if ($Scale == 1 && $Divisions%2 == 1)
                $Divisions--;
            }
            else
            $Divisions = $this->Divisions;

            $this->DivisionCount = $Divisions;

            $DataRange = $this->VMax - $this->VMin;
            if ( $DataRange == 0 ) { $DataRange = .1; }

            $this->DivisionHeight = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $Divisions;
            $this->DivisionRatio  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $DataRange;

            $this->GAreaXOffset  = 0;
            if ( count($Data) > 1 )
            {
                if ( $WithMargin == FALSE )
                $this->DivisionWidth = ( $this->GArea_X2 - $this->GArea_X1 ) / (count($Data)-1);
                else
                {
                    $this->DivisionWidth = ( $this->GArea_X2 - $this->GArea_X1 ) / (count($Data));
                    $this->GAreaXOffset  = $this->DivisionWidth / 2;
                }
            }
            else
            {
                $this->DivisionWidth = $this->GArea_X2 - $this->GArea_X1;
                $this->GAreaXOffset  = $this->DivisionWidth / 2;
            }

            $this->DataCount = count($Data);

            if ( $DrawTicks == FALSE )
            return(0);

            $YPos = $this->GArea_Y2; $XMin = NULL;
            for($i=1;$i<=$Divisions+1;$i++)
            {
                if ( $RightScale )
                $this->drawLine($this->GArea_X2,$YPos,$this->GArea_X2+5,$YPos,$R,$G,$B);
                else
                $this->drawLine($this->GArea_X1,$YPos,$this->GArea_X1-5,$YPos,$R,$G,$B);

                $Value     = $this->VMin + ($i-1) * (( $this->VMax - $this->VMin ) / $Divisions);
                $Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
                if ( $DataDescription['Format']['Y'] == 'number' )
                $Value = $Value.$DataDescription['Unit']['Y'];
                if ( $DataDescription['Format']['Y'] == 'time' )
                $Value = $this->ToTime($Value);
                if ( $DataDescription['Format']['Y'] == 'date' )
                $Value = $this->ToDate($Value);
                if ( $DataDescription['Format']['Y'] == 'metric' )
                $Value = $this->ToMetric($Value);
                if ( $DataDescription['Format']['Y'] == 'currency' )
                $Value = $this->ToCurrency($Value);

                $Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextWidth = $Position[2]-$Position[0];

                if ( $RightScale )
                {
                    imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X2+10,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);
                    if ( $XMin < $this->GArea_X2+15+$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X2+15+$TextWidth; }
                }
                else
                {
                    imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1-10-$TextWidth,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);
                    if ( $XMin > $this->GArea_X1-10-$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X1-10-$TextWidth; }
                }

                $YPos = $YPos - $this->DivisionHeight;
            }

            /* Write the Y Axis caption if set */
            if ( isset($DataDescription['Axis']['Y']) )
            {
                $Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription['Axis']['Y']);
                $TextHeight = abs($Position[1])+abs($Position[3]);
                $TextTop    = (($this->GArea_Y2 - $this->GArea_Y1) / 2) + $this->GArea_Y1 + ($TextHeight/2);

                if ( $RightScale )
                imagettftext($this->Picture,$this->FontSize,90,$XMin+$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription['Axis']['Y']);
                else
                imagettftext($this->Picture,$this->FontSize,90,$XMin-$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription['Axis']['Y']);
            }

            /* Horizontal Axis */
            $XPos = $this->GArea_X1 + $this->GAreaXOffset;
            $ID = 1; $YMax = NULL;
            foreach ( $Data as $Key => $Values )
            {
                if ( $ID % $SkipLabels == 0 )
                {
                    $this->drawLine(floor($XPos),$this->GArea_Y2,floor($XPos),$this->GArea_Y2+5,$R,$G,$B);
                    $Value      = $Data[$Key][$DataDescription['Position']];
                    if ( $DataDescription['Format']['X'] == 'number' )
                    $Value = $Value.$DataDescription['Unit']['X'];
                    if ( $DataDescription['Format']['X'] == 'time' )
                    $Value = $this->ToTime($Value);
                    if ( $DataDescription['Format']['X'] == 'date' )
                    $Value = $this->ToDate($Value);
                    if ( $DataDescription['Format']['X'] == 'metric' )
                    $Value = $this->ToMetric($Value);
                    if ( $DataDescription['Format']['X'] == 'currency' )
                    $Value = $this->ToCurrency($Value);

                    $Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Value);
                    $TextWidth  = abs($Position[2])+abs($Position[0]);
                    $TextHeight = abs($Position[1])+abs($Position[3]);

                    if ( $Angle == 0 )
                    {
                        $YPos = $this->GArea_Y2+18;
                        imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-floor($TextWidth/2),$YPos,$C_TextColor,$this->FontName,$Value);
                    }
                    else
                    {
                        $YPos = $this->GArea_Y2+10+$TextHeight;
                        if ( $Angle <= 90 )
                        imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
                        else
                        imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)+$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
                    }
                    if ( $YMax < $YPos || $YMax == NULL ) { $YMax = $YPos; }
                }

                $XPos = $XPos + $this->DivisionWidth;
                $ID++;
            }

            /* Write the X Axis caption if set */
            if ( isset($DataDescription['Axis']['X']) )
            {
                $Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription['Axis']['X']);
                $TextWidth  = abs($Position[2])+abs($Position[0]);
                $TextLeft   = (($this->GArea_X2 - $this->GArea_X1) / 2) + $this->GArea_X1 + ($TextWidth/2);
                imagettftext($this->Picture,$this->FontSize,0,$TextLeft,$YMax+$this->FontSize+5,$C_TextColor,$this->FontName,$DataDescription['Axis']['X']);
            }
        }

        /* Compute and draw the scale for X/Y charts */
        function drawXYScale($Data,$DataDescription,$YSerieName,$XSerieName,$R,$G,$B,$WithMargin=0,$Angle=0,$Decimals=1)
        {
            /* Validate the Data and DataDescription array */
            $this->validateData('drawScale',$Data);

            $C_TextColor =$this->AllocateColor($this->Picture,$R,$G,$B);

            $this->drawLine($this->GArea_X1,$this->GArea_Y1,$this->GArea_X1,$this->GArea_Y2,$R,$G,$B);
            $this->drawLine($this->GArea_X1,$this->GArea_Y2,$this->GArea_X2,$this->GArea_Y2,$R,$G,$B);

            /* Process Y scale */
            if ( $this->VMin == NULL && $this->VMax == NULL)
            {
                $this->VMin = $Data[0][$YSerieName];
                $this->VMax = $Data[0][$YSerieName];

                foreach ( $Data as $Key => $Values )
                {
                    if (isset($Data[$Key][$YSerieName]))
                    {
                        $Value = $Data[$Key][$YSerieName];
                        if ( $this->VMax < $Value) { $this->VMax = $Value; }
                        if ( $this->VMin > $Value) { $this->VMin = $Value; }
                    }
                }

                if ( $this->VMax > preg_replace('/\.[0-9]+/','',$this->VMax) )
                $this->VMax = preg_replace('/\.[0-9]+/','',$this->VMax)+1;

                $DataRange = $this->VMax - $this->VMin;
                if ( $DataRange == 0 ) { $DataRange = .1; }

                /* Compute automatic scaling */
                $ScaleOk = FALSE; $Factor = 1;
                $MinDivHeight = 25; $MaxDivs = ($this->GArea_Y2 - $this->GArea_Y1) / $MinDivHeight;

                if ( $this->VMin == 0 && $this->VMax == 0 )
                { $this->VMin = 0; $this->VMax = 2; $Scale = 1; $Divisions = 2;}
                elseif ($MaxDivs > 1)
                {
                    while(!$ScaleOk)
                    {
                        $Scale1 = ( $this->VMax - $this->VMin ) / $Factor;
                        $Scale2 = ( $this->VMax - $this->VMin ) / $Factor / 2;
                        $Scale4 = ( $this->VMax - $this->VMin ) / $Factor / 4;

                        if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale1); $Scale = 1;}
                        if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $Divisions = floor($Scale2); $Scale = 2;}
                        if (!$ScaleOk)
                        {
                            if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
                            if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
                        }
                    }

                    if ( floor($this->VMax / $Scale / $Factor) != $this->VMax / $Scale / $Factor)
                    {
                        $GridID     = floor ( $this->VMax / $Scale / $Factor) + 1;
                        $this->VMax = $GridID * $Scale * $Factor;
                        $Divisions++;
                    }

                    if ( floor($this->VMin / $Scale / $Factor) != $this->VMin / $Scale / $Factor)
                    {
                        $GridID     = floor( $this->VMin / $Scale / $Factor);
                        $this->VMin = $GridID * $Scale * $Factor;
                        $Divisions++;
                    }
                }
                else /* Can occurs for small graphs */
                $Scale = 1;

                if ( !isset($Divisions) )
                $Divisions = 2;

                if ( $this->isRealInt(($this->VMax-$this->VMin)/($Divisions-1)))
                $Divisions--;
                elseif ( $this->isRealInt(($this->VMax-$this->VMin)/($Divisions+1)))
                $Divisions++;
            }
            else
            $Divisions = $this->Divisions;

            $this->DivisionCount = $Divisions;

            $DataRange = $this->VMax - $this->VMin;
            if ( $DataRange == 0 ) { $DataRange = .1; }

            $this->DivisionHeight = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $Divisions;
            $this->DivisionRatio  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / $DataRange;

            $YPos = $this->GArea_Y2; $XMin = NULL;
            for($i=1;$i<=$Divisions+1;$i++)
            {
                $this->drawLine($this->GArea_X1,$YPos,$this->GArea_X1-5,$YPos,$R,$G,$B);
                $Value     = $this->VMin + ($i-1) * (( $this->VMax - $this->VMin ) / $Divisions);
                $Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
                if ( $DataDescription['Format']['Y'] == 'number' )
                $Value = $Value.$DataDescription['Unit']['Y'];
                if ( $DataDescription['Format']['Y'] == 'time' )
                $Value = $this->ToTime($Value);
                if ( $DataDescription['Format']['Y'] == 'date' )
                $Value = $this->ToDate($Value);
                if ( $DataDescription['Format']['Y'] == 'metric' )
                $Value = $this->ToMetric($Value);
                if ( $DataDescription['Format']['Y'] == 'currency' )
                $Value = $this->ToCurrency($Value);

                $Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextWidth = $Position[2]-$Position[0];
                imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1-10-$TextWidth,$YPos+($this->FontSize/2),$C_TextColor,$this->FontName,$Value);

                if ( $XMin > $this->GArea_X1-10-$TextWidth || $XMin == NULL ) { $XMin = $this->GArea_X1-10-$TextWidth; }

                $YPos = $YPos - $this->DivisionHeight;
            }

            /* Process X scale */
            if ( $this->VXMin == NULL && $this->VXMax == NULL)
            {
                $this->VXMin = $Data[0][$XSerieName];
                $this->VXMax = $Data[0][$XSerieName];

                foreach ( $Data as $Key => $Values )
                {
                    if (isset($Data[$Key][$XSerieName]))
                    {
                        $Value = $Data[$Key][$XSerieName];
                        if ( $this->VXMax < $Value) { $this->VXMax = $Value; }
                        if ( $this->VXMin > $Value) { $this->VXMin = $Value; }
                    }
                }

                if ( $this->VXMax > preg_replace('/\.[0-9]+/','',$this->VXMax) )
                $this->VXMax = preg_replace('/\.[0-9]+/','',$this->VXMax)+1;

                $DataRange = $this->VMax - $this->VMin;
                if ( $DataRange == 0 ) { $DataRange = .1; }

                /* Compute automatic scaling */
                $ScaleOk = FALSE; $Factor = 1;
                $MinDivWidth = 25; $MaxDivs = ($this->GArea_X2 - $this->GArea_X1) / $MinDivWidth;

                if ( $this->VXMin == 0 && $this->VXMax == 0 )
                { $this->VXMin = 0; $this->VXMax = 2; $Scale = 1; $XDivisions = 2;}
                elseif ($MaxDivs > 1)
                {
                    while(!$ScaleOk)
                    {
                        $Scale1 = ( $this->VXMax - $this->VXMin ) / $Factor;
                        $Scale2 = ( $this->VXMax - $this->VXMin ) / $Factor / 2;
                        $Scale4 = ( $this->VXMax - $this->VXMin ) / $Factor / 4;

                        if ( $Scale1 > 1 && $Scale1 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $XDivisions = floor($Scale1); $Scale = 1;}
                        if ( $Scale2 > 1 && $Scale2 <= $MaxDivs && !$ScaleOk) { $ScaleOk = TRUE; $XDivisions = floor($Scale2); $Scale = 2;}
                        if (!$ScaleOk)
                        {
                            if ( $Scale2 > 1 ) { $Factor = $Factor * 10; }
                            if ( $Scale2 < 1 ) { $Factor = $Factor / 10; }
                        }
                    }

                    if ( floor($this->VXMax / $Scale / $Factor) != $this->VXMax / $Scale / $Factor)
                    {
                        $GridID     = floor ( $this->VXMax / $Scale / $Factor) + 1;
                        $this->VXMax = $GridID * $Scale * $Factor;
                        $XDivisions++;
                    }

                    if ( floor($this->VXMin / $Scale / $Factor) != $this->VXMin / $Scale / $Factor)
                    {
                        $GridID     = floor( $this->VXMin / $Scale / $Factor);
                        $this->VXMin = $GridID * $Scale * $Factor;
                        $XDivisions++;
                    }
                }
                else /* Can occurs for small graphs */
                $Scale = 1;

                if ( !isset($XDivisions) )
                $XDivisions = 2;

                if ( $this->isRealInt(($this->VXMax-$this->VXMin)/($XDivisions-1)))
                $XDivisions--;
                elseif ( $this->isRealInt(($this->VXMax-$this->VXMin)/($XDivisions+1)))
                $XDivisions++;
            }
            else
            $XDivisions = $this->XDivisions;

            $this->XDivisionCount = $Divisions;
            $this->DataCount      = $Divisions + 2;

            $XDataRange = $this->VXMax - $this->VXMin;
            if ( $XDataRange == 0 ) { $XDataRange = .1; }

            $this->DivisionWidth   = ( $this->GArea_X2 - $this->GArea_X1 ) / $XDivisions;
            $this->XDivisionRatio  = ( $this->GArea_X2 - $this->GArea_X1 ) / $XDataRange;

            $XPos = $this->GArea_X1; $YMax = NULL;
            for($i=1;$i<=$XDivisions+1;$i++)
            {
                $this->drawLine($XPos,$this->GArea_Y2,$XPos,$this->GArea_Y2+5,$R,$G,$B);

                $Value     = $this->VXMin + ($i-1) * (( $this->VXMax - $this->VXMin ) / $XDivisions);
                $Value     = round($Value * pow(10,$Decimals)) / pow(10,$Decimals);
                if ( $DataDescription['Format']['Y'] == 'number' )
                $Value = $Value.$DataDescription['Unit']['Y'];
                if ( $DataDescription['Format']['Y'] == 'time' )
                $Value = $this->ToTime($Value);
                if ( $DataDescription['Format']['Y'] == 'date' )
                $Value = $this->ToDate($Value);
                if ( $DataDescription['Format']['Y'] == 'metric' )
                $Value = $this->ToMetric($Value);
                if ( $DataDescription['Format']['Y'] == 'currency' )
                $Value = $this->ToCurrency($Value);

                $Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Value);
                $TextWidth  = abs($Position[2])+abs($Position[0]);
                $TextHeight = abs($Position[1])+abs($Position[3]);

                if ( $Angle == 0 )
                {
                    $YPos = $this->GArea_Y2+18;
                    imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-floor($TextWidth/2),$YPos,$C_TextColor,$this->FontName,$Value);
                }
                else
                {
                    $YPos = $this->GArea_Y2+10+$TextHeight;
                    if ( $Angle <= 90 )
                    imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)-$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
                    else
                    imagettftext($this->Picture,$this->FontSize,$Angle,floor($XPos)+$TextWidth+5,$YPos,$C_TextColor,$this->FontName,$Value);
                }

                if ( $YMax < $YPos || $YMax == NULL ) { $YMax = $YPos; }

                $XPos = $XPos + $this->DivisionWidth;
            }

            /* Write the Y Axis caption if set */
            if ( isset($DataDescription['Axis']['Y']) )
            {
                $Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription['Axis']['Y']);
                $TextHeight = abs($Position[1])+abs($Position[3]);
                $TextTop    = (($this->GArea_Y2 - $this->GArea_Y1) / 2) + $this->GArea_Y1 + ($TextHeight/2);
                imagettftext($this->Picture,$this->FontSize,90,$XMin-$this->FontSize,$TextTop,$C_TextColor,$this->FontName,$DataDescription['Axis']['Y']);
            }

            /* Write the X Axis caption if set */
            if ( isset($DataDescription['Axis']['X']) )
            {
                $Position   = imageftbbox($this->FontSize,90,$this->FontName,$DataDescription['Axis']['X']);
                $TextWidth  = abs($Position[2])+abs($Position[0]);
                $TextLeft   = (($this->GArea_X2 - $this->GArea_X1) / 2) + $this->GArea_X1 + ($TextWidth/2);
                imagettftext($this->Picture,$this->FontSize,0,$TextLeft,$YMax+$this->FontSize+5,$C_TextColor,$this->FontName,$DataDescription['Axis']['X']);
            }
        }

        /* Compute and draw the scale */
        function drawGrid($LineWidth,$Mosaic=TRUE,$R=220,$G=220,$B=220,$Alpha=100)
        {
            /* Draw mosaic */
            if ( $Mosaic )
            {
                $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
                $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

                $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                $C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
                imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
                imagecolortransparent($this->Layers[0],$C_White);

                $C_Rectangle =$this->AllocateColor($this->Layers[0],250,250,250);

                $YPos  = $LayerHeight; //$this->GArea_Y2-1;
                $LastY = $YPos;
                for($i=0;$i<=$this->DivisionCount;$i++)
                {
                    $LastY = $YPos;
                    $YPos  = $YPos - $this->DivisionHeight;

                    if ( $YPos <= 0 ) { $YPos = 1; }

                    if ( $i % 2 == 0 )
                    {
                        imagefilledrectangle($this->Layers[0],1,$YPos,$LayerWidth-1,$LastY,$C_Rectangle);
                    }
                }
                imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
                imagedestroy($this->Layers[0]);
            }

            /* Horizontal lines */
            $YPos = $this->GArea_Y2 - $this->DivisionHeight;
            for($i=1;$i<=$this->DivisionCount;$i++)
            {
                if ( $YPos > $this->GArea_Y1 && $YPos < $this->GArea_Y2 )
                $this->drawDottedLine($this->GArea_X1,$YPos,$this->GArea_X2,$YPos,$LineWidth,$R,$G,$B);

                $YPos = $YPos - $this->DivisionHeight;
            }

            /* Vertical lines */
            if ( $this->GAreaXOffset == 0 )
            { $XPos = $this->GArea_X1 + $this->DivisionWidth + $this->GAreaXOffset; $ColCount = $this->DataCount-2; }
            else
            { $XPos = $this->GArea_X1 + $this->GAreaXOffset; $ColCount = floor( ($this->GArea_X2 - $this->GArea_X1) / $this->DivisionWidth ); }

            for($i=1;$i<=$ColCount;$i++)
            {
                if ( $XPos > $this->GArea_X1 && $XPos < $this->GArea_X2 )
                $this->drawDottedLine(floor($XPos),$this->GArea_Y1,floor($XPos),$this->GArea_Y2,$LineWidth,$R,$G,$B);
                $XPos = $XPos + $this->DivisionWidth;
            }
        }

        /* retrieve the legends size */
        function getLegendBoxSize($DataDescription)
        {
            if ( !isset($DataDescription['Description']) )
            return(-1);

            /* <-10->[8]<-4->Text<-10-> */
            $MaxWidth = 0; $MaxHeight = 8;
            foreach($DataDescription['Description'] as $Key => $Value)
            {
                $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextWidth  = $Position[2]-$Position[0];
                $TextHeight = $Position[1]-$Position[7];
                if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }
                $MaxHeight = $MaxHeight + $TextHeight + 4;
            }
            $MaxHeight = $MaxHeight - 3;
            $MaxWidth  = $MaxWidth + 32;

            return(array($MaxWidth,$MaxHeight));
        }

        /* Draw the data legends */
        function drawLegend($XPos,$YPos,$DataDescription,$R,$G,$B,$Rs=-1,$Gs=-1,$Bs=-1,$Rt=0,$Gt=0,$Bt=0,$Border=TRUE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawLegend',$DataDescription);

            if ( !isset($DataDescription['Description']) )
            return(-1);

            $C_TextColor =$this->AllocateColor($this->Picture,$Rt,$Gt,$Bt);

            /* <-10->[8]<-4->Text<-10-> */
            $MaxWidth = 0; $MaxHeight = 8;
            foreach($DataDescription['Description'] as $Key => $Value)
            {
                #       echo $this->FontName;
                $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextWidth  = $Position[2]-$Position[0];
                $TextHeight = $Position[1]-$Position[7];
                if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }
                $MaxHeight = $MaxHeight + $TextHeight + 4;
            }
            $MaxHeight = $MaxHeight - 5;
            $MaxWidth  = $MaxWidth + 32;

            if ( $Rs == -1 || $Gs == -1 || $Bs == -1 )
            { $Rs = $R-30; $Gs = $G-30; $Bs = $B-30; }

            if ( $Border )
            {
                $this->drawFilledRoundedRectangle($XPos+1,$YPos+1,$XPos+$MaxWidth+1,$YPos+$MaxHeight+1,5,$Rs,$Gs,$Bs);
                $this->drawFilledRoundedRectangle($XPos,$YPos,$XPos+$MaxWidth,$YPos+$MaxHeight,5,$R,$G,$B);
            }

            $YOffset = 4 + $this->FontSize; $ID = 0;
            foreach($DataDescription['Description'] as $Key => $Value)
            {
                $this->drawFilledRoundedRectangle($XPos+10,$YPos+$YOffset-4,$XPos+14,$YPos+$YOffset-4,2,$this->Palette[$ID]['R'],$this->Palette[$ID]['G'],$this->Palette[$ID]['B']);
                imagettftext($this->Picture,$this->FontSize,0,$XPos+22,$YPos+$YOffset,$C_TextColor,$this->FontName,$Value);

                $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextHeight = $Position[1]-$Position[7];

                $YOffset = $YOffset + $TextHeight + 4;
                $ID++;
            }
        }

        /* Draw the data legends */
        function drawPieLegend($XPos,$YPos,$Data,$DataDescription,$R,$G,$B)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawPieLegend',$DataDescription,FALSE);
            $this->validateData('drawPieLegend',$Data);

            if ( !isset($DataDescription['Position']) )
            return(-1);

            $C_TextColor =$this->AllocateColor($this->Picture,0,0,0);

            /* <-10->[8]<-4->Text<-10-> */
            $MaxWidth = 0; $MaxHeight = 8;
            foreach($Data as $Key => $Value)
            {
                $Value2 = $Value[$DataDescription['Position']];
                $Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value2);
                $TextWidth = $Position[2]-$Position[0];
                $TextHeight = $Position[1]-$Position[7];
                if ( $TextWidth > $MaxWidth) { $MaxWidth = $TextWidth; }

                $MaxHeight = $MaxHeight + $TextHeight + 4;
            }
            $MaxHeight = $MaxHeight - 3;
            $MaxWidth  = $MaxWidth + 32;

            $this->drawFilledRoundedRectangle($XPos+1,$YPos+1,$XPos+$MaxWidth+1,$YPos+$MaxHeight+1,5,$R-30,$G-30,$B-30);
            $this->drawFilledRoundedRectangle($XPos,$YPos,$XPos+$MaxWidth,$YPos+$MaxHeight,5,$R,$G,$B);

            $YOffset = 4 + $this->FontSize; $ID = 0;
            foreach($Data as $Key => $Value)
            {
                $Value2     = $Value[$DataDescription['Position']];
                $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value2);
                $TextHeight = $Position[1]-$Position[7];
                $this->drawFilledRectangle($XPos+10,$YPos+$YOffset-6,$XPos+14,$YPos+$YOffset-2,$this->Palette[$ID]['R'],$this->Palette[$ID]['G'],$this->Palette[$ID]['B']);

                imagettftext($this->Picture,$this->FontSize,0,$XPos+22,$YPos+$YOffset,$C_TextColor,$this->FontName,$Value2);
                $YOffset = $YOffset + $TextHeight + 4;
                $ID++;
            }
        }

        /* Draw the graph title */
        function drawTitle($XPos,$YPos,$Value,$R,$G,$B,$XPos2=-1,$YPos2=-1,$Shadow=FALSE)
        {
            $C_TextColor = $this->AllocateColor($this->Picture,$R,$G,$B);

            if ( $XPos2 != -1 )
            {
                $Position  = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextWidth = $Position[2]-$Position[0];
                $XPos      = floor(( $XPos2 - $XPos - $TextWidth ) / 2 ) + $XPos;
            }

            if ( $YPos2 != -1 )
            {
                $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Value);
                $TextHeight = $Position[5]-$Position[3];
                $YPos       = floor(( $YPos2 - $YPos - $TextHeight ) / 2 ) + $YPos;
            }

            if ( $Shadow )
            {
                $C_ShadowColor = $this->AllocateColor($this->Picture,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor);
                imagettftext($this->Picture,$this->FontSize,0,$XPos+$this->ShadowXDistance,$YPos+$this->ShadowYDistance,$C_ShadowColor,$this->FontName,$Value);
            }

            imagettftext($this->Picture,$this->FontSize,0,$XPos,$YPos,$C_TextColor,$this->FontName,$Value);
        }

        /* Draw a text box with text align & alpha properties */
        function drawTextBox($X1,$Y1,$X2,$Y2,$Text,$Angle=0,$R=255,$G=255,$B=255,$Align=ALIGN_LEFT,$Shadow=TRUE,$BgR=-1,$BgG=-1,$BgB=-1,$Alpha=100)
        {
            $Position   = imageftbbox($this->FontSize,$Angle,$this->FontName,$Text);
            $TextWidth  = $Position[2]-$Position[0];
            $TextHeight = $Position[5]-$Position[3];
            $AreaWidth  = $X2 - $X1;
            $AreaHeight = $Y2 - $Y1;

            if ( $BgR != -1 && $BgG != -1 && $BgB != -1 )
            $this->drawFilledRectangle($X1,$Y1,$X2,$Y2,$BgR,$BgG,$BgB,FALSE,$Alpha);

            if ( $Align == ALIGN_TOP_LEFT )      { $X = $X1+1; $Y = $Y1+$this->FontSize+1; }
            if ( $Align == ALIGN_TOP_CENTER )    { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y1+$this->FontSize+1; }
            if ( $Align == ALIGN_TOP_RIGHT )     { $X = $X2-$TextWidth-1; $Y = $Y1+$this->FontSize+1; }
            if ( $Align == ALIGN_LEFT )          { $X = $X1+1; $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
            if ( $Align == ALIGN_CENTER )        { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
            if ( $Align == ALIGN_RIGHT )         { $X = $X2-$TextWidth-1; $Y = $Y1+($AreaHeight/2)-($TextHeight/2); }
            if ( $Align == ALIGN_BOTTOM_LEFT )   { $X = $X1+1; $Y = $Y2-1; }
            if ( $Align == ALIGN_BOTTOM_CENTER ) { $X = $X1+($AreaWidth/2)-($TextWidth/2); $Y = $Y2-1; }
            if ( $Align == ALIGN_BOTTOM_RIGHT )  { $X = $X2-$TextWidth-1; $Y = $Y2-1; }

            $C_TextColor   =$this->AllocateColor($this->Picture,$R,$G,$B);
            $C_ShadowColor =$this->AllocateColor($this->Picture,0,0,0);
            if ( $Shadow )
            imagettftext($this->Picture,$this->FontSize,$Angle,$X+1,$Y+1,$C_ShadowColor,$this->FontName,$Text);

            imagettftext($this->Picture,$this->FontSize,$Angle,$X,$Y,$C_TextColor,$this->FontName,$Text);
        }

        /* Compute and draw the scale */
        function drawTreshold($Value,$R,$G,$B,$ShowLabel=FALSE,$ShowOnRight=FALSE,$TickWidth=4,$FreeText=NULL)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_TextColor =$this->AllocateColor($this->Picture,$R,$G,$B);
            $Y = $this->GArea_Y2 - ($Value - $this->VMin) * $this->DivisionRatio;

            if ( $Y <= $this->GArea_Y1 || $Y >= $this->GArea_Y2 )
            return(-1);

            if ( $TickWidth == 0 )
            $this->drawLine($this->GArea_X1,$Y,$this->GArea_X2,$Y,$R,$G,$B);
            else
            $this->drawDottedLine($this->GArea_X1,$Y,$this->GArea_X2,$Y,$TickWidth,$R,$G,$B);

            if ( $ShowLabel )
            {
                if ( $FreeText == NULL )
                { $Label = $Value; } else { $Label = $FreeText; }

                if ( $ShowOnRight )
                imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X2+2,$Y+($this->FontSize/2),$C_TextColor,$this->FontName,$Label);
                else
                imagettftext($this->Picture,$this->FontSize,0,$this->GArea_X1+2,$Y-($this->FontSize/2),$C_TextColor,$this->FontName,$Label);
            }
        }

        /* This function put a label on a specific point */
        function setLabel($Data,$DataDescription,$SerieName,$ValueName,$Caption,$R=210,$G=210,$B=210)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('setLabel',$DataDescription);
            $this->validateData('setLabel',$Data);
            $ShadowFactor = 100;
            $C_Label      =$this->AllocateColor($this->Picture,$R,$G,$B);
            $C_Shadow     =$this->AllocateColor($this->Picture,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
            $C_TextColor  =$this->AllocateColor($this->Picture,0,0,0);

            $Cp = 0; $Found = FALSE;
            foreach ( $Data as $Key => $Value )
            {
                if ( $Data[$Key][$DataDescription['Position']] == $ValueName )
                { $NumericalValue = $Data[$Key][$SerieName]; $Found = TRUE; }
                if ( !$Found )
                $Cp++;
            }

            $XPos = $this->GArea_X1 + $this->GAreaXOffset + ( $this->DivisionWidth * $Cp ) + 2;
            $YPos = $this->GArea_Y2 - ($NumericalValue - $this->VMin) * $this->DivisionRatio;

            $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
            $TextHeight = $Position[3] - $Position[5];
            $TextWidth  = $Position[2]-$Position[0] + 2;
            $TextOffset = floor($TextHeight/2);

            // Shadow
            $Poly = array($XPos+1,$YPos+1,$XPos + 9,$YPos - $TextOffset,$XPos + 8,$YPos + $TextOffset + 2);
            imagefilledpolygon($this->Picture,$Poly,3,$C_Shadow);
            $this->drawLine($XPos,$YPos+1,$XPos + 9,$YPos - $TextOffset - .2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
            $this->drawLine($XPos,$YPos+1,$XPos + 9,$YPos + $TextOffset + 2.2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);
            $this->drawFilledRectangle($XPos + 9,$YPos - $TextOffset-.2,$XPos + 13 + $TextWidth,$YPos + $TextOffset + 2.2,$R-$ShadowFactor,$G-$ShadowFactor,$B-$ShadowFactor);

            // Label background
            $Poly = array($XPos,$YPos,$XPos + 8,$YPos - $TextOffset - 1,$XPos + 8,$YPos + $TextOffset + 1);
            imagefilledpolygon($this->Picture,$Poly,3,$C_Label);
            $this->drawLine($XPos-1,$YPos,$XPos + 8,$YPos - $TextOffset - 1.2,$R,$G,$B);
            $this->drawLine($XPos-1,$YPos,$XPos + 8,$YPos + $TextOffset + 1.2,$R,$G,$B);
            $this->drawFilledRectangle($XPos + 8,$YPos - $TextOffset - 1.2,$XPos + 12 + $TextWidth,$YPos + $TextOffset + 1.2,$R,$G,$B);

            imagettftext($this->Picture,$this->FontSize,0,$XPos + 10,$YPos + $TextOffset,$C_TextColor,$this->FontName,$Caption);
        }

        /* This function draw a plot graph */
        function drawPlotGraph($Data,$DataDescription,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=FALSE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawPlotGraph',$DataDescription);
            $this->validateData('drawPlotGraph',$Data);

            $GraphID = 0;
            $Ro = $R2; $Go = $G2; $Bo = $B2;

            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $R = $this->Palette[$ColorID]['R'];
                $G = $this->Palette[$ColorID]['G'];
                $B = $this->Palette[$ColorID]['B'];
                $R2 = $Ro; $G2 = $Go; $B2 = $Bo;

                if ( isset($DataDescription['Symbol'][$ColName]) )
                {
                    $Is_Alpha = ((ord ( file_get_contents ($DataDescription['Symbol'][$ColName], false, null, 25, 1)) & 6) & 4) == 4;

                    $Infos       = getimagesize($DataDescription['Symbol'][$ColName]);
                    $ImageWidth  = $Infos[0];
                    $ImageHeight = $Infos[1];
                    $Symbol      = imagecreatefromgif($DataDescription['Symbol'][$ColName]);
                }

                $XPos  = $this->GArea_X1 + $this->GAreaXOffset;
                $Hsize = round($BigRadius/2);
                $R3 = -1; $G3 = -1; $B3 = -1;
                foreach ( $Data as $Key => $Values )
                {
                    $Value = $Data[$Key][$ColName];
                    $YPos  = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

                    /* Save point into the image map if option activated */
                    if ( $this->BuildMap )
                    $this->addToImageMap($XPos-$Hsize,$YPos-$Hsize,$XPos+1+$Hsize,$YPos+$Hsize+1,$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'Plot');

                    if ( is_numeric($Value) )
                    {
                        if ( !isset($DataDescription['Symbol'][$ColName]) )
                        {

                            if ( $Shadow )
                            {
                                if ( $R3 !=-1 && $G3 !=-1 && $B3 !=-1 )
                                $this->drawFilledCircle($XPos+2,$YPos+2,$BigRadius,$R3,$G3,$B3);
                                else
                                {
                                    $R3 = $this->Palette[$ColorID]['R']-20; if ( $R3 < 0 ) { $R3 = 0; }
                                    $G3 = $this->Palette[$ColorID]['G']-20; if ( $G3 < 0 ) { $G3 = 0; }
                                    $B3 = $this->Palette[$ColorID]['B']-20; if ( $B3 < 0 ) { $B3 = 0; }
                                    $this->drawFilledCircle($XPos+2,$YPos+2,$BigRadius,$R3,$G3,$B3);
                                }
                            }

                            $this->drawFilledCircle($XPos+1,$YPos+1,$BigRadius,$R,$G,$B);

                            if ( $SmallRadius != 0 )
                            {
                                if ( $R2 !=-1 && $G2 !=-1 && $B2 !=-1 )
                                $this->drawFilledCircle($XPos+1,$YPos+1,$SmallRadius,$R2,$G2,$B2);
                                else
                                {
                                    $R2 = $this->Palette[$ColorID]['R']-15; if ( $R2 < 0 ) { $R2 = 0; }
                                    $G2 = $this->Palette[$ColorID]['G']-15; if ( $G2 < 0 ) { $G2 = 0; }
                                    $B2 = $this->Palette[$ColorID]['B']-15; if ( $B2 < 0 ) { $B2 = 0; }

                                    $this->drawFilledCircle($XPos+1,$YPos+1,$SmallRadius,$R2,$G2,$B2);
                                }
                            }
                        }
                        else
                        {
                            imagecopymerge($this->Picture,$Symbol,$XPos+1-$ImageWidth/2,$YPos+1-$ImageHeight/2,0,0,$ImageWidth,$ImageHeight,100);
                        }
                    }

                    $XPos = $XPos + $this->DivisionWidth;
                }
                $GraphID++;
            }
        }

        /* This function draw a plot graph in an X/Y space */
        function drawXYPlotGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0,$BigRadius=5,$SmallRadius=2,$R2=-1,$G2=-1,$B2=-1,$Shadow=TRUE)
        {
            $R = $this->Palette[$PaletteID]['R'];
            $G = $this->Palette[$PaletteID]['G'];
            $B = $this->Palette[$PaletteID]['B'];
            $R3 = -1; $G3 = -1; $B3 = -1;

            $YLast = -1; $XLast = -1;
            foreach ( $Data as $Key => $Values )
            {
                if ( isset($Data[$Key][$YSerieName]) && isset($Data[$Key][$XSerieName]) )
                {
                    $X = $Data[$Key][$XSerieName];
                    $Y = $Data[$Key][$YSerieName];

                    $Y = $this->GArea_Y2 - (($Y-$this->VMin) * $this->DivisionRatio);
                    $X = $this->GArea_X1 + (($X-$this->VXMin) * $this->XDivisionRatio);


                    if ( $Shadow )
                    {
                        if ( $R3 !=-1 && $G3 !=-1 && $B3 !=-1 )
                        $this->drawFilledCircle($X+2,$Y+2,$BigRadius,$R3,$G3,$B3);
                        else
                        {
                            $R3 = $this->Palette[$PaletteID]['R']-20; if ( $R < 0 ) { $R = 0; }
                            $G3 = $this->Palette[$PaletteID]['G']-20; if ( $G < 0 ) { $G = 0; }
                            $B3 = $this->Palette[$PaletteID]['B']-20; if ( $B < 0 ) { $B = 0; }
                            $this->drawFilledCircle($X+2,$Y+2,$BigRadius,$R3,$G3,$B3);
                        }
                    }

                    $this->drawFilledCircle($X+1,$Y+1,$BigRadius,$R,$G,$B);

                    if ( $R2 !=-1 && $G2 !=-1 && $B2 !=-1 )
                    $this->drawFilledCircle($X+1,$Y+1,$SmallRadius,$R2,$G2,$B2);
                    else
                    {
                        $R2 = $this->Palette[$PaletteID]['R']+20; if ( $R > 255 ) { $R = 255; }
                        $G2 = $this->Palette[$PaletteID]['G']+20; if ( $G > 255 ) { $G = 255; }
                        $B2 = $this->Palette[$PaletteID]['B']+20; if ( $B > 255 ) { $B = 255; }
                        $this->drawFilledCircle($X+1,$Y+1,$SmallRadius,$R2,$G2,$B2);
                    }
                }
            }

        }

        /* This function draw an area between two series */
        function drawArea($Data,$Serie1,$Serie2,$R,$G,$B,$Alpha = 50)
        {
            /* Validate the Data and DataDescription array */
            $this->validateData('drawArea',$Data);

            $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
            $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

            $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
            $C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
            imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
            imagecolortransparent($this->Layers[0],$C_White);

            $C_Graph =$this->AllocateColor($this->Layers[0],$R,$G,$B);

            $XPos     = $this->GAreaXOffset;
            $LastXPos = -1;
            foreach ( $Data as $Key => $Values )
            {
                $Value1 = $Data[$Key][$Serie1];
                $Value2 = $Data[$Key][$Serie2];
                $YPos1  = $LayerHeight - (($Value1-$this->VMin) * $this->DivisionRatio);
                $YPos2  = $LayerHeight - (($Value2-$this->VMin) * $this->DivisionRatio);

                if ( $LastXPos != -1 )
                {
                    $Points   = '';
                    $Points[] = $LastXPos; $Points[] = $LastYPos1;
                    $Points[] = $LastXPos; $Points[] = $LastYPos2;
                    $Points[] = $XPos; $Points[] = $YPos2;
                    $Points[] = $XPos; $Points[] = $YPos1;

                    imagefilledpolygon($this->Layers[0],$Points,4,$C_Graph);
                }

                $LastYPos1 = $YPos1;
                $LastYPos2 = $YPos2;
                $LastXPos  = $XPos;

                $XPos = $XPos + $this->DivisionWidth;
            }

            imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
            imagedestroy($this->Layers[0]);
        }


        /* This function write the values of the specified series */
        function writeValues($Data,$DataDescription,$Series)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('writeValues',$DataDescription);
            $this->validateData('writeValues',$Data);

            if ( !is_array($Series) ) { $Series = array($Series); }

            foreach($Series as $Key => $Serie)
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $Serie ) { $ColorID = $ID; }; $ID++; }

                $XPos  = $this->GArea_X1 + $this->GAreaXOffset;
                $XLast = -1;
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$Serie]) && is_numeric($Data[$Key][$Serie]))
                    {
                        $Value = $Data[$Key][$Serie];
                        $YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

                        $Positions = imagettfbbox($this->FontSize,0,$this->FontName,$Value);
                        $Width  = $Positions[2] - $Positions[6]; $XOffset = $XPos - ($Width/2);
                        $Height = $Positions[3] - $Positions[7]; $YOffset = $YPos - 4;

                        $C_TextColor =$this->AllocateColor($this->Picture,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                        imagettftext($this->Picture,$this->FontSize,0,$XOffset,$YOffset,$C_TextColor,$this->FontName,$Value);
                    }
                    $XPos = $XPos + $this->DivisionWidth;
                }

            }
        }

        /* This function draw a line graph */
        function drawLineGraph($Data,$DataDescription,$SerieName='')
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawLineGraph',$DataDescription);
            $this->validateData('drawLineGraph',$Data);

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                if ( $SerieName == '' || $SerieName == $ColName )
                {
                    $XPos  = $this->GArea_X1 + $this->GAreaXOffset;
                    $XLast = -1;
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        {
                            $Value = $Data[$Key][$ColName];
                            $YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

                            /* Save point into the image map if option activated */
                            if ( $this->BuildMap )
                            $this->addToImageMap($XPos-3,$YPos-3,$XPos+3,$YPos+3,$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'Line');

                            if (!is_numeric($Value)) { $XLast = -1; }
                            if ( $XLast != -1 )
                            $this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE);

                            $XLast = $XPos;
                            $YLast = $YPos;
                            if (!is_numeric($Value)) { $XLast = -1; }
                        }
                        $XPos = $XPos + $this->DivisionWidth;
                    }
                    $GraphID++;
                }
            }
        }

        /* This function draw a line graph */
        function drawXYGraph($Data,$DataDescription,$YSerieName,$XSerieName,$PaletteID=0)
        {
            $YLast = -1; $XLast = -1;
            foreach ( $Data as $Key => $Values )
            {
                if ( isset($Data[$Key][$YSerieName]) && isset($Data[$Key][$XSerieName]) )
                {
                    $X = $Data[$Key][$XSerieName];
                    $Y = $Data[$Key][$YSerieName];

                    $Y = $this->GArea_Y2 - (($Y-$this->VMin) * $this->DivisionRatio);
                    $X = $this->GArea_X1 + (($X-$this->VXMin) * $this->XDivisionRatio);

                    if ($XLast != -1 && $YLast != -1)
                    {
                        $this->drawLine($XLast,$YLast,$X,$Y,$this->Palette[$PaletteID]['R'],$this->Palette[$PaletteID]['G'],$this->Palette[$PaletteID]['B'],TRUE);
                    }

                    $XLast = $X;
                    $YLast = $Y;
                }
            }
        }

        /* This function draw a cubic curve */
        function drawCubicCurve($Data,$DataDescription,$Accuracy=.1,$SerieName='')
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawCubicCurve',$DataDescription);
            $this->validateData('drawCubicCurve',$Data);

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                if ( $SerieName == '' || $SerieName == $ColName )
                {
                    $XIn = ''; $Yin = ''; $Yt = ''; $U = '';
                    $XIn[0] = 0; $YIn[0] = 0;

                    $ID = 0;
                    foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                    { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                    $Index = 1;
                    $XLast = -1; $Missing = '';
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]) )
                        {
                            $Value = $Data[$Key][$ColName];
                            $XIn[$Index] = $Index;
                            $YIn[$Index] = $Value;
                            if ( !is_numeric($Value) ) { $Missing[$Index] = TRUE; }
                            $Index++;
                        }
                    }
                    $Index--;

                    $Yt[0] = 0;
                    $Yt[1] = 0;
                    $U[1]  = 0;
                    for($i=2;$i<=$Index-1;$i++)
                    {
                        $Sig    = ($XIn[$i] - $XIn[$i-1]) / ($XIn[$i+1] - $XIn[$i-1]);
                        $p      = $Sig * $Yt[$i-1] + 2;
                        $Yt[$i] = ($Sig - 1) / $p;
                        $U[$i]  = ($YIn[$i+1] - $YIn[$i]) / ($XIn[$i+1] - $XIn[$i]) - ($YIn[$i] - $YIn[$i-1]) / ($XIn[$i] - $XIn[$i-1]);
                        $U[$i]  = (6 * $U[$i] / ($XIn[$i+1] - $XIn[$i-1]) - $Sig * $U[$i-1]) / $p;
                    }

                    $qn = 0;
                    $un = 0;
                    $Yt[$Index] = ($un - $qn * $U[$Index-1]) / ($qn * $Yt[$Index-1] + 1);

                    for($k=$Index-1;$k>=1;$k--)
                    $Yt[$k] = $Yt[$k] * $Yt[$k+1] + $U[$k];

                    $XPos  = $this->GArea_X1 + $this->GAreaXOffset;
                    for($X=1;$X<=$Index;$X=$X+$Accuracy)
                    {
                        $klo = 1;
                        $khi = $Index;
                        $k   = $khi - $klo;
                        while($k > 1)
                        {
                            $k = $khi - $klo;
                            If ( $XIn[$k] >= $X )
                            $khi = $k;
                            else
                            $klo = $k;
                        }
                        $klo = $khi - 1;

                        $h     = $XIn[$khi] - $XIn[$klo];
                        $a     = ($XIn[$khi] - $X) / $h;
                        $b     = ($X - $XIn[$klo]) / $h;
                        $Value = $a * $YIn[$klo] + $b * $YIn[$khi] + (($a*$a*$a - $a) * $Yt[$klo] + ($b*$b*$b - $b) * $Yt[$khi]) * ($h*$h) / 6;

                        $YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

                        if ( $XLast != -1 && !isset($Missing[floor($X)]) && !isset($Missing[floor($X+1)]) )
                        $this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE);

                        $XLast = $XPos;
                        $YLast = $YPos;
                        $XPos  = $XPos + $this->DivisionWidth * $Accuracy;
                    }

                    // Add potentialy missing values
                    $XPos  = $XPos - $this->DivisionWidth * $Accuracy;
                    if ( $XPos < ($this->GArea_X2 - $this->GAreaXOffset) )
                    {
                        $YPos = $this->GArea_Y2 - (($YIn[$Index]-$this->VMin) * $this->DivisionRatio);
                        $this->drawLine($XLast,$YLast,$this->GArea_X2-$this->GAreaXOffset,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE);
                    }

                    $GraphID++;
                }
            }
        }

        /* This function draw a filled cubic curve */
        function drawFilledCubicCurve($Data,$DataDescription,$Accuracy=.1,$Alpha=100,$AroundZero=FALSE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawFilledCubicCurve',$DataDescription);
            $this->validateData('drawFilledCubicCurve',$Data);

            $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
            $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;
            $YZero = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
            if ( $YZero > $LayerHeight ) { $YZero = $LayerHeight; }

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $XIn = ''; $Yin = ''; $Yt = ''; $U = '';
                $XIn[0] = 0; $YIn[0] = 0;

                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $Index = 1;
                $XLast = -1; $Missing = '';
                foreach ( $Data as $Key => $Values )
                {
                    $Value = $Data[$Key][$ColName];
                    $XIn[$Index] = $Index;
                    $YIn[$Index] = $Value;
                    if ( !is_numeric($Value) ) { $Missing[$Index] = TRUE; }
                    $Index++;
                }
                $Index--;

                $Yt[0] = 0;
                $Yt[1] = 0;
                $U[1]  = 0;
                for($i=2;$i<=$Index-1;$i++)
                {
                    $Sig    = ($XIn[$i] - $XIn[$i-1]) / ($XIn[$i+1] - $XIn[$i-1]);
                    $p      = $Sig * $Yt[$i-1] + 2;
                    $Yt[$i] = ($Sig - 1) / $p;
                    $U[$i]  = ($YIn[$i+1] - $YIn[$i]) / ($XIn[$i+1] - $XIn[$i]) - ($YIn[$i] - $YIn[$i-1]) / ($XIn[$i] - $XIn[$i-1]);
                    $U[$i]  = (6 * $U[$i] / ($XIn[$i+1] - $XIn[$i-1]) - $Sig * $U[$i-1]) / $p;
                }

                $qn = 0;
                $un = 0;
                $Yt[$Index] = ($un - $qn * $U[$Index-1]) / ($qn * $Yt[$Index-1] + 1);

                for($k=$Index-1;$k>=1;$k--)
                $Yt[$k] = $Yt[$k] * $Yt[$k+1] + $U[$k];

                $Points   = '';
                $Points[] = $this->GAreaXOffset;
                $Points[] = $LayerHeight;

                $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                $C_White         =$this->AllocateColor($this->Layers[0],255,255,255);
                imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
                imagecolortransparent($this->Layers[0],$C_White);

                $YLast = NULL;
                $XPos  = $this->GAreaXOffset; $PointsCount = 2;
                for($X=1;$X<=$Index;$X=$X+$Accuracy)
                {
                    $klo = 1;
                    $khi = $Index;
                    $k   = $khi - $klo;
                    while($k > 1)
                    {
                        $k = $khi - $klo;
                        If ( $XIn[$k] >= $X )
                        $khi = $k;
                        else
                        $klo = $k;
                    }
                    $klo = $khi - 1;

                    $h     = $XIn[$khi] - $XIn[$klo];
                    $a     = ($XIn[$khi] - $X) / $h;
                    $b     = ($X - $XIn[$klo]) / $h;
                    $Value = $a * $YIn[$klo] + $b * $YIn[$khi] + (($a*$a*$a - $a) * $Yt[$klo] + ($b*$b*$b - $b) * $Yt[$khi]) * ($h*$h) / 6;

                    $YPos = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

                    if ( $YLast != NULL && $AroundZero && !isset($Missing[floor($X)]) && !isset($Missing[floor($X+1)]))
                    {
                        $aPoints   = '';
                        $aPoints[] = $XLast;
                        $aPoints[] = $YLast;
                        $aPoints[] = $XPos;
                        $aPoints[] = $YPos;
                        $aPoints[] = $XPos;
                        $aPoints[] = $YZero;
                        $aPoints[] = $XLast;
                        $aPoints[] = $YZero;

                        $C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                        imagefilledpolygon($this->Layers[0],$aPoints,4,$C_Graph);
                    }

                    if ( !isset($Missing[floor($X)]) || $YLast == NULL )
                    {
                        $PointsCount++;
                        $Points[] = $XPos;
                        $Points[] = $YPos;
                    }
                    else
                    {
                        $PointsCount++; $Points[] = $XLast; $Points[] = $LayerHeight;
                    }

                    $YLast = $YPos; $XLast = $XPos;
                    $XPos  = $XPos + $this->DivisionWidth * $Accuracy;
                }

                // Add potentialy missing values
                $XPos  = $XPos - $this->DivisionWidth * $Accuracy;
                if ( $XPos < ($LayerWidth-$this->GAreaXOffset) )
                {
                    $YPos = $LayerHeight - (($YIn[$Index]-$this->VMin) * $this->DivisionRatio);

                    if ( $YLast != NULL && $AroundZero )
                    {
                        $aPoints   = '';
                        $aPoints[] = $XLast;
                        $aPoints[] = $YLast;
                        $aPoints[] = $LayerWidth-$this->GAreaXOffset;
                        $aPoints[] = $YPos;
                        $aPoints[] = $LayerWidth-$this->GAreaXOffset;
                        $aPoints[] = $YZero;
                        $aPoints[] = $XLast;
                        $aPoints[] = $YZero;

                        $C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                        imagefilledpolygon($this->Layers[0],$aPoints,4,$C_Graph);
                    }

                    if ( $YIn[$klo] != '' && $YIn[$khi] != '' || $YLast == NULL )
                    {
                        $PointsCount++;
                        $Points[] = $LayerWidth-$this->GAreaXOffset;
                        $Points[] = $YPos;
                    }
                }

                $Points[] = $LayerWidth-$this->GAreaXOffset;
                $Points[] = $LayerHeight;

                if ( !$AroundZero )
                {
                    $C_Graph =$this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                    imagefilledpolygon($this->Layers[0],$Points,$PointsCount,$C_Graph);
                }

                imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
                imagedestroy($this->Layers[0]);

                $this->drawCubicCurve($Data,$DataDescription,$Accuracy,$ColName);

                $GraphID++;
            }
        }

        /* This function draw a filled line graph */
        function drawFilledLineGraph($Data,$DataDescription,$Alpha=100,$AroundZero=FALSE)
        {
            $Empty = -2147483647;

            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawFilledLineGraph',$DataDescription);
            $this->validateData('drawFilledLineGraph',$Data);

            $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
            $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $aPoints   = '';
                $aPoints[] = $this->GAreaXOffset;
                $aPoints[] = $LayerHeight;

                $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                $C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
                imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
                imagecolortransparent($this->Layers[0],$C_White);

                $XPos  = $this->GAreaXOffset;
                $XLast = -1; $PointsCount = 2;
                $YZero = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
                if ( $YZero > $LayerHeight ) { $YZero = $LayerHeight; }

                $YLast = $Empty;
                foreach ( $Data as $Key => $Values )
                {
                    $Value = $Data[$Key][$ColName];
                    $YPos = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

                    /* Save point into the image map if option activated */
                    if ( $this->BuildMap )
                    $this->addToImageMap($XPos-3,$YPos-3,$XPos+3,$YPos+3,$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'FLine');

                    if ( !is_numeric($Value) )
                    {
                        $PointsCount++;
                        $aPoints[] = $XLast;
                        $aPoints[] = $LayerHeight;

                        $YLast = $Empty;
                    }
                    else
                    {
                        $PointsCount++;
                        if ( $YLast <> $Empty )
                        { $aPoints[] = $XPos; $aPoints[] = $YPos; }
                        else
                        { $PointsCount++; $aPoints[] = $XPos; $aPoints[] = $LayerHeight; $aPoints[] = $XPos; $aPoints[] = $YPos; }

                        if ($YLast <> $Empty && $AroundZero)
                        {
                            $Points   = '';
                            $Points[] = $XLast; $Points[] = $YLast;
                            $Points[] = $XPos;
                            $Points[] = $YPos;
                            $Points[] = $XPos;
                            $Points[] = $YZero;
                            $Points[] = $XLast;
                            $Points[] = $YZero;

                            $C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                            imagefilledpolygon($this->Layers[0],$Points,4,$C_Graph);
                        }
                        $YLast = $YPos;
                    }

                    $XLast = $XPos;
                    $XPos  = $XPos + $this->DivisionWidth;
                }
                $aPoints[] = $LayerWidth - $this->GAreaXOffset;
                $aPoints[] = $LayerHeight;

                if ( $AroundZero == FALSE )
                {
                    $C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                    imagefilledpolygon($this->Layers[0],$aPoints,$PointsCount,$C_Graph);
                }

                imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
                imagedestroy($this->Layers[0]);
                $GraphID++;
                $this->drawLineGraph($Data,$DataDescription,$ColName);
            }
        }

        /* This function draw a bar graph */
        function drawOverlayBarGraph($Data,$DataDescription,$Alpha=50)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawOverlayBarGraph',$DataDescription);
            $this->validateData('drawOverlayBarGraph',$Data);

            $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
            $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $this->Layers[$GraphID] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                $C_White                = $this->AllocateColor($this->Layers[$GraphID],255,255,255);
                $C_Graph                = $this->AllocateColor($this->Layers[$GraphID],$this->Palette[$GraphID]['R'],$this->Palette[$GraphID]['G'],$this->Palette[$GraphID]['B']);
                imagefilledrectangle($this->Layers[$GraphID],0,0,$LayerWidth,$LayerHeight,$C_White);
                imagecolortransparent($this->Layers[$GraphID],$C_White);

                $XWidth = $this->DivisionWidth / 4;
                $XPos   = $this->GAreaXOffset;
                $YZero  = $LayerHeight - ((0-$this->VMin) * $this->DivisionRatio);
                $XLast  = -1; $PointsCount = 2;
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$ColName]) )
                    {
                        $Value = $Data[$Key][$ColName];
                        if ( is_numeric($Value) )
                        {
                            $YPos  = $LayerHeight - (($Value-$this->VMin) * $this->DivisionRatio);

                            imagefilledrectangle($this->Layers[$GraphID],$XPos-$XWidth,$YPos,$XPos+$XWidth,$YZero,$C_Graph);

                            $X1 = floor($XPos - $XWidth + $this->GArea_X1); $Y1 = floor($YPos+$this->GArea_Y1) + .2;
                            $X2 = floor($XPos + $XWidth + $this->GArea_X1); $Y2 = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
                            if ( $X1 <= $this->GArea_X1 ) { $X1 = $this->GArea_X1 + 1; }
                            if ( $X2 >= $this->GArea_X2 ) { $X2 = $this->GArea_X2 - 1; }

                            /* Save point into the image map if option activated */
                            if ( $this->BuildMap )
                            $this->addToImageMap($X1,min($Y1,$Y2),$X2,max($Y1,$Y2),$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'oBar');

                            $this->drawLine($X1,$Y1,$X2,$Y1,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE);
                        }
                    }
                    $XPos = $XPos + $this->DivisionWidth;
                }

                $GraphID++;
            }

            for($i=0;$i<=($GraphID-1);$i++)
            {
                imagecopymerge($this->Picture,$this->Layers[$i],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
                imagedestroy($this->Layers[$i]);
            }
        }

        /* This function draw a bar graph */
        function drawBarGraph($Data,$DataDescription,$Shadow=FALSE,$Alpha=100)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawBarGraph',$DataDescription);
            $this->validateData('drawBarGraph',$Data);

            $GraphID      = 0;
            $Series       = count($DataDescription['Values']);
            $SeriesWidth  = $this->DivisionWidth / ($Series+1);
            $SerieXOffset = $this->DivisionWidth / 2 - $SeriesWidth / 2;

            $YZero  = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
            if ( $YZero > $this->GArea_Y2 ) { $YZero = $this->GArea_Y2; }

            $SerieID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $XPos  = $this->GArea_X1 + $this->GAreaXOffset - $SerieXOffset + $SeriesWidth * $SerieID;
                $XLast = -1;
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$ColName]))
                    {
                        if ( is_numeric($Data[$Key][$ColName]) )
                        {
                            $Value = $Data[$Key][$ColName];
                            $YPos = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);

                            /* Save point into the image map if option activated */
                            if ( $this->BuildMap )
                            {
                                $this->addToImageMap($XPos+1,min($YZero,$YPos),$XPos+$SeriesWidth-1,max($YZero,$YPos),$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'Bar');
                            }

                            if ( $Shadow && $Alpha == 100 )
                            $this->drawRectangle($XPos+1,$YZero,$XPos+$SeriesWidth-1,$YPos,25,25,25,TRUE,$Alpha);

                            $this->drawFilledRectangle($XPos+1,$YZero,$XPos+$SeriesWidth-1,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE,$Alpha);
                        }
                    }
                    $XPos = $XPos + $this->DivisionWidth;
                }
                $SerieID++;
            }
        }

        /* This function draw a stacked bar graph */
        function drawStackedBarGraph($Data,$DataDescription,$Alpha=50,$Contiguous=FALSE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawBarGraph',$DataDescription);
            $this->validateData('drawBarGraph',$Data);

            $GraphID      = 0;
            $Series       = count($DataDescription['Values']);
            if ( $Contiguous )
            $SeriesWidth  = $this->DivisionWidth;
            else
            $SeriesWidth  = $this->DivisionWidth * .8;

            $YZero  = $this->GArea_Y2 - ((0-$this->VMin) * $this->DivisionRatio);
            if ( $YZero > $this->GArea_Y2 ) { $YZero = $this->GArea_Y2; }

            $SerieID = 0; $LastValue = '';
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $XPos  = $this->GArea_X1 + $this->GAreaXOffset - $SeriesWidth / 2;
                $XLast = -1;
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$ColName]))
                    {
                        if ( is_numeric($Data[$Key][$ColName]) )
                        {
                            $Value = $Data[$Key][$ColName];

                            if ( isset($LastValue[$Key]) )
                            {
                                $YPos    = $this->GArea_Y2 - ((($Value+$LastValue[$Key])-$this->VMin) * $this->DivisionRatio);
                                $YBottom = $this->GArea_Y2 - (($LastValue[$Key]-$this->VMin) * $this->DivisionRatio);
                                $LastValue[$Key] += $Value;
                            }
                            else
                            {
                                $YPos    = $this->GArea_Y2 - (($Value-$this->VMin) * $this->DivisionRatio);
                                $YBottom = $YZero;
                                $LastValue[$Key] = $Value;
                            }

                            /* Save point into the image map if option activated */
                            if ( $this->BuildMap )
                            $this->addToImageMap($XPos+1,min($YBottom,$YPos),$XPos+$SeriesWidth-1,max($YBottom,$YPos),$DataDescription['Description'][$ColName],$Data[$Key][$ColName].$DataDescription['Unit']['Y'],'sBar');

                            $this->drawFilledRectangle($XPos+1,$YBottom,$XPos+$SeriesWidth-1,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B'],TRUE,$Alpha);
                        }
                    }
                    $XPos = $XPos + $this->DivisionWidth;
                }
                $SerieID++;
            }
        }

        /* This function draw a limits bar graphs */
        function drawLimitsGraph($Data,$DataDescription,$R=0,$G=0,$B=0)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawLimitsGraph',$DataDescription);
            $this->validateData('drawLimitsGraph',$Data);

            $XWidth = $this->DivisionWidth / 4;
            $XPos   = $this->GArea_X1 + $this->GAreaXOffset;

            foreach ( $Data as $Key => $Values )
            {
                $Min     = $Data[$Key][$DataDescription['Values'][0]];
                $Max     = $Data[$Key][$DataDescription['Values'][0]];
                $GraphID = 0; $MaxID = 0; $MinID = 0;
                foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                {
                    if ( isset($Data[$Key][$ColName]) )
                    {
                        if ( $Data[$Key][$ColName] > $Max && is_numeric($Data[$Key][$ColName]))
                        { $Max = $Data[$Key][$ColName]; $MaxID = $GraphID; }
                    }
                    if ( isset($Data[$Key][$ColName]) && is_numeric($Data[$Key][$ColName]))
                    {
                        if ( $Data[$Key][$ColName] < $Min )
                        { $Min = $Data[$Key][$ColName]; $MinID = $GraphID; }
                        $GraphID++;
                    }
                }

                $YPos = $this->GArea_Y2 - (($Max-$this->VMin) * $this->DivisionRatio);
                $X1 = floor($XPos - $XWidth); $Y1 = floor($YPos) - .2;
                $X2 = floor($XPos + $XWidth);
                if ( $X1 <= $this->GArea_X1 ) { $X1 = $this->GArea_X1 + 1; }
                if ( $X2 >= $this->GArea_X2 ) { $X2 = $this->GArea_X2 - 1; }

                $YPos = $this->GArea_Y2 - (($Min-$this->VMin) * $this->DivisionRatio);
                $Y2 = floor($YPos) + .2;

                $this->drawLine(floor($XPos)-.2,$Y1+1,floor($XPos)-.2,$Y2-1,$R,$G,$B,TRUE);
                $this->drawLine(floor($XPos)+.2,$Y1+1,floor($XPos)+.2,$Y2-1,$R,$G,$B,TRUE);
                $this->drawLine($X1,$Y1,$X2,$Y1,$this->Palette[$MaxID]['R'],$this->Palette[$MaxID]['G'],$this->Palette[$MaxID]['B'],FALSE);
                $this->drawLine($X1,$Y2,$X2,$Y2,$this->Palette[$MinID]['R'],$this->Palette[$MinID]['G'],$this->Palette[$MinID]['B'],FALSE);

                $XPos = $XPos + $this->DivisionWidth;
            }
        }

        /* This function draw radar axis centered on the graph area */
        function drawRadarAxis($Data,$DataDescription,$Mosaic=TRUE,$BorderOffset=10,$A_R=60,$A_G=60,$A_B=60,$S_R=200,$S_G=200,$S_B=200,$MaxValue=-1)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawRadarAxis',$DataDescription);
            $this->validateData('drawRadarAxis',$Data);

            $C_TextColor = $this->AllocateColor($this->Picture,$A_R,$A_G,$A_B);

            /* Draw radar axis */
            $Points  = count($Data);
            $Radius  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
            $XCenter = ( $this->GArea_X2 - $this->GArea_X1 ) / 2 + $this->GArea_X1;
            $YCenter = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 + $this->GArea_Y1;

            /* Search for the max value */
            if ( $MaxValue == -1 )
            {
                foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                {
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        if ( $Data[$Key][$ColName] > $MaxValue ) { $MaxValue = $Data[$Key][$ColName]; }
                    }
                }
            }

            /* Draw the mosaic */
            if ( $Mosaic )
            {
                $RadiusScale = $Radius / $MaxValue;
                for ( $t=1; $t<=$MaxValue-1; $t++)
                {
                    $TRadius  = $RadiusScale * $t;
                    $LastX1   = -1;

                    for ( $i=0; $i<=$Points; $i++)
                    {
                        $Angle = -90 + $i * 360/$Points;
                        $X1 = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
                        $Y1 = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;
                        $X2 = cos($Angle * 3.1418 / 180 ) * ($TRadius+$RadiusScale) + $XCenter;
                        $Y2 = sin($Angle * 3.1418 / 180 ) * ($TRadius+$RadiusScale) + $YCenter;

                        if ( $t % 2 == 1 && $LastX1 != -1)
                        {
                            $Plots   = '';
                            $Plots[] = $X1; $Plots[] = $Y1;
                            $Plots[] = $X2; $Plots[] = $Y2;
                            $Plots[] = $LastX2; $Plots[] = $LastY2;
                            $Plots[] = $LastX1; $Plots[] = $LastY1;

                            $C_Graph = $this->AllocateColor($this->Picture,250,250,250);
                            imagefilledpolygon($this->Picture,$Plots,(count($Plots)+1)/2,$C_Graph);
                        }

                        $LastX1 = $X1; $LastY1= $Y1;
                        $LastX2 = $X2; $LastY2= $Y2;
                    }
                }
            }


            /* Draw the spider web */
            for ( $t=1; $t<=$MaxValue; $t++)
            {
                $TRadius = ( $Radius / $MaxValue ) * $t;
                $LastX   = -1;

                for ( $i=0; $i<=$Points; $i++)
                {
                    $Angle = -90 + $i * 360/$Points;
                    $X = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
                    $Y = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;

                    if ( $LastX != -1 )
                    $this->drawDottedLine($LastX,$LastY,$X,$Y,4,$S_R,$S_G,$S_B);

                    $LastX = $X; $LastY= $Y;
                }
            }

            /* Draw the axis */
            for ( $i=0; $i<=$Points; $i++)
            {
                $Angle = -90 + $i * 360/$Points;
                $X = cos($Angle * 3.1418 / 180 ) * $Radius + $XCenter;
                $Y = sin($Angle * 3.1418 / 180 ) * $Radius + $YCenter;

                $this->drawLine($XCenter,$YCenter,$X,$Y,$A_R,$A_G,$A_B);

                $XOffset = 0; $YOffset = 0;
                if (isset($Data[$i][$DataDescription['Position']]))
                {
                    $Label = $Data[$i][$DataDescription['Position']];

                    $Positions = imagettfbbox($this->FontSize,0,$this->FontName,$Label);
                    $Width  = $Positions[2] - $Positions[6];
                    $Height = $Positions[3] - $Positions[7];

                    if ( $Angle >= 0 && $Angle <= 90 )
                    $YOffset = $Height;

                    if ( $Angle > 90 && $Angle <= 180 )
                    { $YOffset = $Height; $XOffset = -$Width; }

                    if ( $Angle > 180 && $Angle <= 270 )
                    { $XOffset = -$Width; }

                    imagettftext($this->Picture,$this->FontSize,0,$X+$XOffset,$Y+$YOffset,$C_TextColor,$this->FontName,$Label);
                }
            }

            /* Write the values */
            for ( $t=1; $t<=$MaxValue; $t++)
            {
                $TRadius = ( $Radius / $MaxValue ) * $t;

                $Angle = -90 + 360 / $Points;
                $X1 = $XCenter;
                $Y1 = $YCenter - $TRadius;
                $X2 = cos($Angle * 3.1418 / 180 ) * $TRadius + $XCenter;
                $Y2 = sin($Angle * 3.1418 / 180 ) * $TRadius + $YCenter;

                $XPos = floor(($X2-$X1)/2) + $X1;
                $YPos = floor(($Y2-$Y1)/2) + $Y1;

                $Positions = imagettfbbox($this->FontSize,0,$this->FontName,$t);
                $X = $XPos - ( $X+$Positions[2] - $X+$Positions[6] ) / 2;
                $Y = $YPos + $this->FontSize;

                $this->drawFilledRoundedRectangle($X+$Positions[6]-2,$Y+$Positions[7]-1,$X+$Positions[2]+4,$Y+$Positions[3]+1,2,240,240,240);
                $this->drawRoundedRectangle($X+$Positions[6]-2,$Y+$Positions[7]-1,$X+$Positions[2]+4,$Y+$Positions[3]+1,2,220,220,220);
                imagettftext($this->Picture,$this->FontSize,0,$X,$Y,$C_TextColor,$this->FontName,$t);
            }
        }

        /* This function draw a radar graph centered on the graph area */
        function drawRadar($Data,$DataDescription,$BorderOffset=10,$MaxValue=-1)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawRadar',$DataDescription);
            $this->validateData('drawRadar',$Data);

            $Points  = count($Data);
            $Radius  = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
            $XCenter = ( $this->GArea_X2 - $this->GArea_X1 ) / 2 + $this->GArea_X1;
            $YCenter = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 + $this->GArea_Y1;

            /* Search for the max value */
            if ( $MaxValue == -1 )
            {
                foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                {
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        if ( $Data[$Key][$ColName] > $MaxValue ) { $MaxValue = $Data[$Key][$ColName]; }
                    }
                }
            }

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $Angle = -90;
                $XLast = -1;
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$ColName]))
                    {
                        $Value    = $Data[$Key][$ColName];
                        $Strength = ( $Radius / $MaxValue ) * $Value;

                        $XPos = cos($Angle * 3.1418 / 180 ) * $Strength + $XCenter;
                        $YPos = sin($Angle * 3.1418 / 180 ) * $Strength + $YCenter;

                        if ( $XLast != -1 )
                        $this->drawLine($XLast,$YLast,$XPos,$YPos,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);

                        if ( $XLast == -1 )
                        { $FirstX = $XPos; $FirstY = $YPos; }

                        $Angle = $Angle + (360/$Points);
                        $XLast = $XPos;
                        $YLast = $YPos;
                    }
                }
                $this->drawLine($XPos,$YPos,$FirstX,$FirstY,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                $GraphID++;
            }
        }

        /* This function draw a radar graph centered on the graph area */
        function drawFilledRadar($Data,$DataDescription,$Alpha=50,$BorderOffset=10,$MaxValue=-1)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawFilledRadar',$DataDescription);
            $this->validateData('drawFilledRadar',$Data);

            $Points      = count($Data);
            $LayerWidth  = $this->GArea_X2-$this->GArea_X1;
            $LayerHeight = $this->GArea_Y2-$this->GArea_Y1;
            $Radius      = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2 - $BorderOffset;
            $XCenter     = ( $this->GArea_X2 - $this->GArea_X1 ) / 2;
            $YCenter     = ( $this->GArea_Y2 - $this->GArea_Y1 ) / 2;

            /* Search for the max value */
            if ( $MaxValue == -1 )
            {
                foreach ( $DataDescription['Values'] as $Key2 => $ColName )
                {
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        if ( $Data[$Key][$ColName] > $MaxValue && is_numeric($Data[$Key][$ColName])) { $MaxValue = $Data[$Key][$ColName]; }
                    }
                }
            }

            $GraphID = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                $ID = 0;
                foreach ( $DataDescription['Description'] as $keyI => $ValueI )
                { if ( $keyI == $ColName ) { $ColorID = $ID; }; $ID++; }

                $Angle = -90;
                $XLast = -1;
                $Plots = '';
                foreach ( $Data as $Key => $Values )
                {
                    if ( isset($Data[$Key][$ColName]))
                    {
                        $Value    = $Data[$Key][$ColName];
                        if ( !is_numeric($Value) ) { $Value = 0; }
                        $Strength = ( $Radius / $MaxValue ) * $Value;

                        $XPos = cos($Angle * 3.1418 / 180 ) * $Strength + $XCenter;
                        $YPos = sin($Angle * 3.1418 / 180 ) * $Strength + $YCenter;

                        $Plots[] = $XPos;
                        $Plots[] = $YPos;

                        $Angle = $Angle + (360/$Points);
                        $XLast = $XPos;
                        $YLast = $YPos;
                    }
                }

                if (isset($Plots[0]))
                {
                    $Plots[] = $Plots[0];
                    $Plots[] = $Plots[1];

                    $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                    $C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
                    imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
                    imagecolortransparent($this->Layers[0],$C_White);

                    $C_Graph = $this->AllocateColor($this->Layers[0],$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                    imagefilledpolygon($this->Layers[0],$Plots,(count($Plots)+1)/2,$C_Graph);

                    imagecopymerge($this->Picture,$this->Layers[0],$this->GArea_X1,$this->GArea_Y1,0,0,$LayerWidth,$LayerHeight,$Alpha);
                    imagedestroy($this->Layers[0]);

                    for($i=0;$i<=count($Plots)-4;$i=$i+2)
                    $this->drawLine($Plots[$i]+$this->GArea_X1,$Plots[$i+1]+$this->GArea_Y1,$Plots[$i+2]+$this->GArea_X1,$Plots[$i+3]+$this->GArea_Y1,$this->Palette[$ColorID]['R'],$this->Palette[$ColorID]['G'],$this->Palette[$ColorID]['B']);
                }

                $GraphID++;
            }
        }

        /* This function draw a flat pie chart */
        function drawBasicPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$R=255,$G=255,$B=255,$Decimals=0)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawBasicPieGraph',$DataDescription,FALSE);
            $this->validateData('drawBasicPieGraph',$Data);

            /* Determine pie sum */
            $Series = 0; $PieSum = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                if ( $ColName != $DataDescription['Position'] )
                {
                    $Series++;
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        $PieSum = $PieSum + $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription['Position']];
                    }
                }
            }

            /* Validate serie */
            if ( $Series != 1 )
            RaiseFatal('Pie chart can only accept one serie of data.');

            $SpliceRatio         = 360 / $PieSum;
            $SplicePercent       = 100 / $PieSum;

            /* Calculate all polygons */
            $Angle    = 0; $TopPlots = '';
            foreach($iValues as $Key => $Value)
            {
                $TopPlots[$Key][] = $XPos;
                $TopPlots[$Key][] = $YPos;

                /* Process labels position & size */
                $Caption = '';
                if ( !($DrawLabels == PIE_NOLABEL) )
                {
                    $TAngle   = $Angle+($Value*$SpliceRatio/2);
                    if ($DrawLabels == PIE_PERCENTAGE)
                    $Caption  = (round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';
                    elseif ($DrawLabels == PIE_LABELS)
                    $Caption  = $iLabels[$Key];
                    elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
                    $Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';
                    elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
                    $Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';

                    $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
                    $TextWidth  = $Position[2]-$Position[0];
                    $TextHeight = abs($Position[1])+abs($Position[3]);

                    $TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius+10) + $XPos;

                    if ( $TAngle > 0 && $TAngle < 180 )
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+10) + $YPos + 4;
                    else
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+4) + $YPos - ($TextHeight/2);

                    if ( $TAngle > 90 && $TAngle < 270 )
                    $TX = $TX - $TextWidth;

                    $C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
                    imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
                }

                /* Process pie slices */
                for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
                {
                    $TopX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos;
                    $TopY = sin($iAngle * 3.1418 / 180 ) * $Radius + $YPos;

                    $TopPlots[$Key][] = $TopX;
                    $TopPlots[$Key][] = $TopY;
                }

                $TopPlots[$Key][] = $XPos;
                $TopPlots[$Key][] = $YPos;

                $Angle = $iAngle;
            }
            $PolyPlots = $TopPlots;

            /* Set array values type to float --- PHP Bug with imagefilledpolygon casting to integer */
            foreach ($TopPlots as $Key => $Value)
            { foreach ($TopPlots[$Key] as $Key2 => $Value2) { settype($TopPlots[$Key][$Key2],'float'); } }

            /* Draw Top polygons */
            foreach ($PolyPlots as $Key => $Value)
            {
                $C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]['R'],$this->Palette[$Key]['G'],$this->Palette[$Key]['B']);
                imagefilledpolygon($this->Picture,$PolyPlots[$Key],(count($PolyPlots[$Key])+1)/2,$C_GraphLo);
            }

            $this->drawCircle($XPos-.5,$YPos-.5,$Radius,$R,$G,$B);
            $this->drawCircle($XPos-.5,$YPos-.5,$Radius+.5,$R,$G,$B);

            /* Draw Top polygons */
            foreach ($TopPlots as $Key => $Value)
            {
                for($j=0;$j<=count($TopPlots[$Key])-4;$j=$j+2)
                $this->drawLine($TopPlots[$Key][$j],$TopPlots[$Key][$j+1],$TopPlots[$Key][$j+2],$TopPlots[$Key][$j+3],$R,$G,$B);
            }
        }

        function drawFlatPieGraphWithShadow($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals=0)
        {
            $this->drawFlatPieGraph($Data,$DataDescription,$XPos+$this->ShadowXDistance,$YPos+$this->ShadowYDistance,$Radius,PIE_NOLABEL,$SpliceDistance,$Decimals,TRUE);
            $this->drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius,$DrawLabels,$SpliceDistance,$Decimals,FALSE);
        }

        /* This function draw a flat pie chart */
        function drawFlatPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$SpliceDistance=0,$Decimals=0,$AllBlack=FALSE)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawFlatPieGraph',$DataDescription,FALSE);
            $this->validateData('drawFlatPieGraph',$Data);

            $ShadowStatus = $this->ShadowActive ; $this->ShadowActive = FALSE;

            /* Determine pie sum */
            $Series = 0; $PieSum = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                if ( $ColName != $DataDescription['Position'] )
                {
                    $Series++;
                    foreach ( $Data as $Key => $Values )
                    {
                        if ( isset($Data[$Key][$ColName]))
                        $PieSum = $PieSum + $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription['Position']];
                    }
                }
            }

            /* Validate serie */
            if ( $Series != 1 )
            {
                RaiseFatal('Pie chart can only accept one serie of data.');
                return(0);
            }

            $SpliceRatio   = 360 / $PieSum;
            $SplicePercent = 100 / $PieSum;

            /* Calculate all polygons */
            $Angle = 0; $TopPlots = '';
            foreach($iValues as $Key => $Value)
            {
                $XOffset = cos(($Angle+($Value/2*$SpliceRatio)) * 3.1418 / 180 ) * $SpliceDistance;
                $YOffset = sin(($Angle+($Value/2*$SpliceRatio)) * 3.1418 / 180 ) * $SpliceDistance;

                $TopPlots[$Key][] = round($XPos + $XOffset);
                $TopPlots[$Key][] = round($YPos + $YOffset);

                if ( $AllBlack )
                { $Rc = $this->ShadowRColor; $Gc = $this->ShadowGColor; $Bc = $this->ShadowBColor; }
                else
                { $Rc = $this->Palette[$Key]['R']; $Gc = $this->Palette[$Key]['G']; $Bc = $this->Palette[$Key]['B']; }

                $XLineLast = ''; $YLineLast = '';

                /* Process labels position & size */
                $Caption = '';
                if ( !($DrawLabels == PIE_NOLABEL) )
                {
                    $TAngle   = $Angle+($Value*$SpliceRatio/2);
                    if ($DrawLabels == PIE_PERCENTAGE)
                    $Caption  = (round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';
                    elseif ($DrawLabels == PIE_LABELS)
                    $Caption  = $iLabels[$Key];
                    elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
                    $Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';
                    elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
                    $Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';

                    $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
                    $TextWidth  = $Position[2]-$Position[0];
                    $TextHeight = abs($Position[1])+abs($Position[3]);

                    $TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius+10+$SpliceDistance) + $XPos;

                    if ( $TAngle > 0 && $TAngle < 180 )
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+10+$SpliceDistance) + $YPos + 4;
                    else
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($Radius+$SpliceDistance+4) + $YPos - ($TextHeight/2);

                    if ( $TAngle > 90 && $TAngle < 270 )
                    $TX = $TX - $TextWidth;

                    $C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
                    imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
                }

                /* Process pie slices */
                if ( !$AllBlack )
                $LineColor = $this->AllocateColor($this->Picture,$Rc,$Gc,$Bc);
                else
                $LineColor = $this->AllocateColor($this->Picture,$Rc,$Gc,$Bc);

                $XLineLast = ''; $YLineLast = '';
                for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
                {
                    $PosX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos + $XOffset;
                    $PosY = sin($iAngle * 3.1418 / 180 ) * $Radius + $YPos + $YOffset;

                    $TopPlots[$Key][] = round($PosX); $TopPlots[$Key][] = round($PosY);

                    if ( $iAngle == $Angle || $iAngle == $Angle+$Value*$SpliceRatio || $iAngle +.5 > $Angle+$Value*$SpliceRatio)
                    $this->drawLine($XPos+$XOffset,$YPos+$YOffset,$PosX,$PosY,$Rc,$Gc,$Bc);

                    if ( $XLineLast != '' )
                    $this->drawLine($XLineLast,$YLineLast,$PosX,$PosY,$Rc,$Gc,$Bc);

                    $XLineLast = $PosX; $YLineLast = $PosY;
                }

                $TopPlots[$Key][] = round($XPos + $XOffset);  $TopPlots[$Key][] = round($YPos + $YOffset);

                $Angle = $iAngle;
            }
            $PolyPlots = $TopPlots;

            /* Draw Top polygons */
            foreach ($PolyPlots as $Key => $Value)
            {
                if ( !$AllBlack )
                $C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]['R'],$this->Palette[$Key]['G'],$this->Palette[$Key]['B']);
                else
                $C_GraphLo = $this->AllocateColor($this->Picture,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor);

                imagefilledpolygon($this->Picture,$PolyPlots[$Key],(count($PolyPlots[$Key])+1)/2,$C_GraphLo);
            }
            $this->ShadowActive = $ShadowStatus;
        }

        /* This function draw a pseudo-3D pie chart */
        function drawPieGraph($Data,$DataDescription,$XPos,$YPos,$Radius=100,$DrawLabels=PIE_NOLABEL,$EnhanceColors=TRUE,$Skew=60,$SpliceHeight=20,$SpliceDistance=0,$Decimals=0)
        {
            /* Validate the Data and DataDescription array */
            $this->validateDataDescription('drawPieGraph',$DataDescription,FALSE);
            $this->validateData('drawPieGraph',$Data);

            /* Determine pie sum */
            $Series = 0; $PieSum = 0; $rPieSum = 0;
            foreach ( $DataDescription['Values'] as $Key2 => $ColName )
            {
                if ( $ColName != $DataDescription['Position'] )
                {
                    $Series++;
                    foreach ( $Data as $Key => $Values )
                    if ( isset($Data[$Key][$ColName]))
                    {
                        if ( $Data[$Key][$ColName] == 0 )
                        { $iValues[] = 0; $rValues[] = 0; $iLabels[] = $Data[$Key][$DataDescription['Position']]; }
                        // Removed : $PieSum++; $rValues[] = 1;
                        else
                        { $PieSum += $Data[$Key][$ColName]; $iValues[] = $Data[$Key][$ColName]; $iLabels[] = $Data[$Key][$DataDescription['Position']]; $rValues[] = $Data[$Key][$ColName]; $rPieSum += $Data[$Key][$ColName];}
                    }
                }
            }

            /* Validate serie */
            if ( $Series != 1 )
            RaiseFatal('Pie chart can only accept one serie of data.');

            $SpliceDistanceRatio = $SpliceDistance;
            $SkewHeight          = ($Radius * $Skew) / 100;
            $SpliceRatio         = (360 - $SpliceDistanceRatio * count($iValues) ) / $PieSum;
            $SplicePercent       = 100 / $PieSum;
            $rSplicePercent      = 100 / $rPieSum;

            /* Calculate all polygons */
            $Angle    = 0; $CDev = 5;
            $TopPlots = ''; $BotPlots = '';
            $aTopPlots = ''; $aBotPlots = '';
            foreach($iValues as $Key => $Value)
            {
                $XCenterPos = cos(($Angle-$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $XPos;
                $YCenterPos = sin(($Angle-$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $YPos;
                $XCenterPos2 = cos(($Angle+$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $XPos;
                $YCenterPos2 = sin(($Angle+$CDev+($Value*$SpliceRatio+$SpliceDistanceRatio)/2) * 3.1418 / 180 ) * $SpliceDistance + $YPos;

                $TopPlots[$Key][] = round($XCenterPos); $BotPlots[$Key][] = round($XCenterPos);
                $TopPlots[$Key][] = round($YCenterPos); $BotPlots[$Key][] = round($YCenterPos + $SpliceHeight);
                $aTopPlots[$Key][] = $XCenterPos; $aBotPlots[$Key][] = $XCenterPos;
                $aTopPlots[$Key][] = $YCenterPos; $aBotPlots[$Key][] = $YCenterPos + $SpliceHeight;

                /* Process labels position & size */
                $Caption = '';
                if ( !($DrawLabels == PIE_NOLABEL) )
                {
                    $TAngle   = $Angle+($Value*$SpliceRatio/2);
                    if ($DrawLabels == PIE_PERCENTAGE)
                    $Caption  = (round($rValues[$Key] * pow(10,$Decimals) * $rSplicePercent)/pow(10,$Decimals)).'%';
                    elseif ($DrawLabels == PIE_LABELS)
                    $Caption  = $iLabels[$Key];
                    elseif ($DrawLabels == PIE_PERCENTAGE_LABEL)
                    $Caption  = $iLabels[$Key]."\r\n".(round($Value * pow(10,$Decimals) * $SplicePercent)/pow(10,$Decimals)).'%';

                    $Position   = imageftbbox($this->FontSize,0,$this->FontName,$Caption);
                    $TextWidth  = $Position[2]-$Position[0];
                    $TextHeight = abs($Position[1])+abs($Position[3]);

                    $TX = cos(($TAngle) * 3.1418 / 180 ) * ($Radius + 10)+ $XPos;

                    if ( $TAngle > 0 && $TAngle < 180 )
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($SkewHeight + 10) + $YPos + $SpliceHeight + 4;
                    else
                    $TY = sin(($TAngle) * 3.1418 / 180 ) * ($SkewHeight + 4) + $YPos - ($TextHeight/2);

                    if ( $TAngle > 90 && $TAngle < 270 )
                    $TX = $TX - $TextWidth;

                    $C_TextColor = $this->AllocateColor($this->Picture,70,70,70);
                    imagettftext($this->Picture,$this->FontSize,0,$TX,$TY,$C_TextColor,$this->FontName,$Caption);
                }

                /* Process pie slices */
                for($iAngle=$Angle;$iAngle<=$Angle+$Value*$SpliceRatio;$iAngle=$iAngle+.5)
                {
                    $TopX = cos($iAngle * 3.1418 / 180 ) * $Radius + $XPos;
                    $TopY = sin($iAngle * 3.1418 / 180 ) * $SkewHeight + $YPos;

                    $TopPlots[$Key][] = round($TopX); $BotPlots[$Key][] = round($TopX);
                    $TopPlots[$Key][] = round($TopY); $BotPlots[$Key][] = round($TopY + $SpliceHeight);
                    $aTopPlots[$Key][] = $TopX; $aBotPlots[$Key][] = $TopX;
                    $aTopPlots[$Key][] = $TopY; $aBotPlots[$Key][] = $TopY + $SpliceHeight;
                }

                $TopPlots[$Key][] = round($XCenterPos2); $BotPlots[$Key][] = round($XCenterPos2);
                $TopPlots[$Key][] = round($YCenterPos2); $BotPlots[$Key][] = round($YCenterPos2 + $SpliceHeight);
                $aTopPlots[$Key][] = $XCenterPos2; $aBotPlots[$Key][] = $XCenterPos2;
                $aTopPlots[$Key][] = $YCenterPos2; $aBotPlots[$Key][] = $YCenterPos2 + $SpliceHeight;

                $Angle = $iAngle + $SpliceDistanceRatio;
            }

            /* Draw Bottom polygons */
            foreach($iValues as $Key => $Value)
            {
                $C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]['R'],$this->Palette[$Key]['G'],$this->Palette[$Key]['B'],-20);
                imagefilledpolygon($this->Picture,$BotPlots[$Key],(count($BotPlots[$Key])+1)/2,$C_GraphLo);

                if ( $EnhanceColors ) { $En = -10; } else { $En = 0; }

                for($j=0;$j<=count($aBotPlots[$Key])-4;$j=$j+2)
                $this->drawLine($aBotPlots[$Key][$j],$aBotPlots[$Key][$j+1],$aBotPlots[$Key][$j+2],$aBotPlots[$Key][$j+3],$this->Palette[$Key]['R']+$En,$this->Palette[$Key]['G']+$En,$this->Palette[$Key]['B']+$En);
            }

            /* Draw pie layers */
            if ( $EnhanceColors ) { $ColorRatio = 30 / $SpliceHeight; } else { $ColorRatio = 25 / $SpliceHeight; }
            for($i=$SpliceHeight-1;$i>=1;$i--)
            {
                foreach($iValues as $Key => $Value)
                {
                    $C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]['R'],$this->Palette[$Key]['G'],$this->Palette[$Key]['B'],-10);
                    $Plots = ''; $Plot = 0;
                    foreach($TopPlots[$Key] as $Key2 => $Value2)
                    {
                        $Plot++;
                        if ( $Plot % 2 == 1 )
                        $Plots[] = $Value2;
                        else
                        $Plots[] = $Value2+$i;
                    }
                    imagefilledpolygon($this->Picture,$Plots,(count($Plots)+1)/2,$C_GraphLo);

                    $Index       = count($Plots);
                    if ($EnhanceColors ) {$ColorFactor = -20 + ($SpliceHeight - $i) * $ColorRatio; } else { $ColorFactor = 0; }

                    $this->drawAntialiasPixel($Plots[0],$Plots[1],$this->Palette[$Key]['R']+$ColorFactor,$this->Palette[$Key]['G']+$ColorFactor,$this->Palette[$Key]['B']+$ColorFactor);
                    $this->drawAntialiasPixel($Plots[2],$Plots[3],$this->Palette[$Key]['R']+$ColorFactor,$this->Palette[$Key]['G']+$ColorFactor,$this->Palette[$Key]['B']+$ColorFactor);
                    $this->drawAntialiasPixel($Plots[$Index-4],$Plots[$Index-3],$this->Palette[$Key]['R']+$ColorFactor,$this->Palette[$Key]['G']+$ColorFactor,$this->Palette[$Key]['B']+$ColorFactor);
                }
            }

            /* Draw Top polygons */
            for($Key=count($iValues)-1;$Key>=0;$Key--)
            {
                $C_GraphLo = $this->AllocateColor($this->Picture,$this->Palette[$Key]['R'],$this->Palette[$Key]['G'],$this->Palette[$Key]['B']);
                imagefilledpolygon($this->Picture,$TopPlots[$Key],(count($TopPlots[$Key])+1)/2,$C_GraphLo);

                if ( $EnhanceColors ) { $En = 10; } else { $En = 0; }
                for($j=0;$j<=count($aTopPlots[$Key])-4;$j=$j+2)
                $this->drawLine($aTopPlots[$Key][$j],$aTopPlots[$Key][$j+1],$aTopPlots[$Key][$j+2],$aTopPlots[$Key][$j+3],$this->Palette[$Key]['R']+$En,$this->Palette[$Key]['G']+$En,$this->Palette[$Key]['B']+$En);
            }
        }

        /* This function can be used to set the background color */
        function drawBackground($R,$G,$B)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
            imagefilledrectangle($this->Picture,0,0,$this->XSize,$this->YSize,$C_Background);
        }

        /* This function can be used to set the background color */
        function drawGraphAreaGradient($R,$G,$B,$Decay,$Target=TARGET_GRAPHAREA)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            if ( $Target == TARGET_GRAPHAREA )  { $X1 = $this->GArea_X1+1; $X2 = $this->GArea_X2-1; $Y1 = $this->GArea_Y1+1; $Y2 = $this->GArea_Y2; }
            if ( $Target == TARGET_BACKGROUND ) { $X1 = 0; $X2 = $this->XSize; $Y1 = 0; $Y2 = $this->YSize; }

            /* Positive gradient */
            if ( $Decay > 0 )
            {
                $YStep = ($Y2 - $Y1 - 2) / $Decay;
                for($i=0;$i<=$Decay;$i++)
                {
                    $R-=1;$G-=1;$B-=1;
                    $Yi1 = $Y1 + ( $i * $YStep );
                    $Yi2 = ceil( $Yi1 + ( $i * $YStep ) + $YStep );
                    if ( $Yi2 >= $Yi2 ) { $Yi2 = $Y2-1; }

                    $C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
                    imagefilledrectangle($this->Picture,$X1,$Yi1,$X2,$Yi2,$C_Background);
                }
            }

            /* Negative gradient */
            if ( $Decay < 0 )
            {
                $YStep = ($Y2 - $Y1 - 2) / -$Decay;
                $Yi1   = $Y1; $Yi2   = $Y1+$YStep;
                for($i=-$Decay;$i>=0;$i--)
                {
                    $R+=1;$G+=1;$B+=1;
                    $C_Background = $this->AllocateColor($this->Picture,$R,$G,$B);
                    imagefilledrectangle($this->Picture,$X1,$Yi1,$X2,$Yi2,$C_Background);

                    $Yi1+= $YStep;
                    $Yi2+= $YStep;
                    if ( $Yi2 >= $Yi2 ) { $Yi2 = $Y2-1; }
                }
            }
        }

        /* This function create a rectangle with antialias */
        function drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

            $X1=$X1-.2;$Y1=$Y1-.2;
            $X2=$X2+.2;$Y2=$Y2+.2;
            $this->drawLine($X1,$Y1,$X2,$Y1,$R,$G,$B);
            $this->drawLine($X2,$Y1,$X2,$Y2,$R,$G,$B);
            $this->drawLine($X2,$Y2,$X1,$Y2,$R,$G,$B);
            $this->drawLine($X1,$Y2,$X1,$Y1,$R,$G,$B);
        }

        /* This function create a filled rectangle with antialias */
        function drawFilledRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B,$DrawBorder=TRUE,$Alpha=100,$NoFallBack=FALSE)
        {
            if ( $X2 < $X1 ) { list($X1, $X2) = array($X2, $X1); }
            if ( $Y2 < $Y1 ) { list($Y1, $Y2) = array($Y2, $Y1); }

            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            if ( $Alpha == 100 )
            {
                /* Process shadows */
                if ( $this->ShadowActive && !$NoFallBack )
                {
                    $this->drawFilledRectangle($X1+$this->ShadowXDistance,$Y1+$this->ShadowYDistance,$X2+$this->ShadowXDistance,$Y2+$this->ShadowYDistance,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha,TRUE);
                    if ( $this->ShadowBlur != 0 )
                    {
                        $AlphaDecay = ($this->ShadowAlpha / $this->ShadowBlur);

                        for($i=1; $i<=$this->ShadowBlur; $i++)
                        $this->drawFilledRectangle($X1+$this->ShadowXDistance-$i/2,$Y1+$this->ShadowYDistance-$i/2,$X2+$this->ShadowXDistance-$i/2,$Y2+$this->ShadowYDistance-$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
                        for($i=1; $i<=$this->ShadowBlur; $i++)
                        $this->drawFilledRectangle($X1+$this->ShadowXDistance+$i/2,$Y1+$this->ShadowYDistance+$i/2,$X2+$this->ShadowXDistance+$i/2,$Y2+$this->ShadowYDistance+$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,FALSE,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
                    }
                }

                $C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);
                imagefilledrectangle($this->Picture,round($X1),round($Y1),round($X2),round($Y2),$C_Rectangle);
            }
            else
            {
                $LayerWidth  = abs($X2-$X1)+2;
                $LayerHeight = abs($Y2-$Y1)+2;

                $this->Layers[0] = imagecreatetruecolor($LayerWidth,$LayerHeight);
                $C_White         = $this->AllocateColor($this->Layers[0],255,255,255);
                imagefilledrectangle($this->Layers[0],0,0,$LayerWidth,$LayerHeight,$C_White);
                imagecolortransparent($this->Layers[0],$C_White);

                $C_Rectangle = $this->AllocateColor($this->Layers[0],$R,$G,$B);
                imagefilledrectangle($this->Layers[0],round(1),round(1),round($LayerWidth-1),round($LayerHeight-1),$C_Rectangle);

                imagecopymerge($this->Picture,$this->Layers[0],round(min($X1,$X2)-1),round(min($Y1,$Y2)-1),0,0,$LayerWidth,$LayerHeight,$Alpha);
                imagedestroy($this->Layers[0]);
            }

            if ( $DrawBorder )
            {
                $ShadowSettings = $this->ShadowActive; $this->ShadowActive = FALSE;
                $this->drawRectangle($X1,$Y1,$X2,$Y2,$R,$G,$B);
                $this->ShadowActive = $ShadowSettings;
            }
        }

        /* This function create a rectangle with rounded corners and antialias */
        function drawRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

            $Step = 90 / ((3.1418 * $Radius)/2);

            for($i=0;$i<=90;$i=$i+$Step)
            {
                $X = cos(($i+180)*3.1418/180) * $Radius + $X1 + $Radius;
                $Y = sin(($i+180)*3.1418/180) * $Radius + $Y1 + $Radius;
                $this->drawAntialiasPixel($X,$Y,$R,$G,$B);

                $X = cos(($i-90)*3.1418/180) * $Radius + $X2 - $Radius;
                $Y = sin(($i-90)*3.1418/180) * $Radius + $Y1 + $Radius;
                $this->drawAntialiasPixel($X,$Y,$R,$G,$B);

                $X = cos(($i)*3.1418/180) * $Radius + $X2 - $Radius;
                $Y = sin(($i)*3.1418/180) * $Radius + $Y2 - $Radius;
                $this->drawAntialiasPixel($X,$Y,$R,$G,$B);

                $X = cos(($i+90)*3.1418/180) * $Radius + $X1 + $Radius;
                $Y = sin(($i+90)*3.1418/180) * $Radius + $Y2 - $Radius;
                $this->drawAntialiasPixel($X,$Y,$R,$G,$B);
            }

            $X1=$X1-.2;$Y1=$Y1-.2;
            $X2=$X2+.2;$Y2=$Y2+.2;
            $this->drawLine($X1+$Radius,$Y1,$X2-$Radius,$Y1,$R,$G,$B);
            $this->drawLine($X2,$Y1+$Radius,$X2,$Y2-$Radius,$R,$G,$B);
            $this->drawLine($X2-$Radius,$Y2,$X1+$Radius,$Y2,$R,$G,$B);
            $this->drawLine($X1,$Y2-$Radius,$X1,$Y1+$Radius,$R,$G,$B);
        }

        /* This function create a filled rectangle with rounded corners and antialias */
        function drawFilledRoundedRectangle($X1,$Y1,$X2,$Y2,$Radius,$R,$G,$B)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Rectangle = $this->AllocateColor($this->Picture,$R,$G,$B);

            $Step = 90 / ((3.1418 * $Radius)/2);

            for($i=0;$i<=90;$i=$i+$Step)
            {
                $Xi1 = cos(($i+180)*3.1418/180) * $Radius + $X1 + $Radius;
                $Yi1 = sin(($i+180)*3.1418/180) * $Radius + $Y1 + $Radius;

                $Xi2 = cos(($i-90)*3.1418/180) * $Radius + $X2 - $Radius;
                $Yi2 = sin(($i-90)*3.1418/180) * $Radius + $Y1 + $Radius;

                $Xi3 = cos(($i)*3.1418/180) * $Radius + $X2 - $Radius;
                $Yi3 = sin(($i)*3.1418/180) * $Radius + $Y2 - $Radius;

                $Xi4 = cos(($i+90)*3.1418/180) * $Radius + $X1 + $Radius;
                $Yi4 = sin(($i+90)*3.1418/180) * $Radius + $Y2 - $Radius;

                imageline($this->Picture,$Xi1,$Yi1,$X1+$Radius,$Yi1,$C_Rectangle);
                imageline($this->Picture,$X2-$Radius,$Yi2,$Xi2,$Yi2,$C_Rectangle);
                imageline($this->Picture,$X2-$Radius,$Yi3,$Xi3,$Yi3,$C_Rectangle);
                imageline($this->Picture,$Xi4,$Yi4,$X1+$Radius,$Yi4,$C_Rectangle);

                $this->drawAntialiasPixel($Xi1,$Yi1,$R,$G,$B);
                $this->drawAntialiasPixel($Xi2,$Yi2,$R,$G,$B);
                $this->drawAntialiasPixel($Xi3,$Yi3,$R,$G,$B);
                $this->drawAntialiasPixel($Xi4,$Yi4,$R,$G,$B);
            }

            imagefilledrectangle($this->Picture,$X1,$Y1+$Radius,$X2,$Y2-$Radius,$C_Rectangle);
            imagefilledrectangle($this->Picture,$X1+$Radius,$Y1,$X2-$Radius,$Y2,$C_Rectangle);

            $X1=$X1-.2;$Y1=$Y1-.2;
            $X2=$X2+.2;$Y2=$Y2+.2;
            $this->drawLine($X1+$Radius,$Y1,$X2-$Radius,$Y1,$R,$G,$B);
            $this->drawLine($X2,$Y1+$Radius,$X2,$Y2-$Radius,$R,$G,$B);
            $this->drawLine($X2-$Radius,$Y2,$X1+$Radius,$Y2,$R,$G,$B);
            $this->drawLine($X1,$Y2-$Radius,$X1,$Y1+$Radius,$R,$G,$B);
        }

        /* This function create a circle with antialias */
        function drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
        {
            if ( $Width == 0 ) { $Width = $Height; }
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Circle = $this->AllocateColor($this->Picture,$R,$G,$B);
            $Step     = 360 / (2 * 3.1418 * max($Width,$Height));

            for($i=0;$i<=360;$i=$i+$Step)
            {
                $X = cos($i*3.1418/180) * $Height + $Xc;
                $Y = sin($i*3.1418/180) * $Width + $Yc;
                $this->drawAntialiasPixel($X,$Y,$R,$G,$B);
            }
        }

        /* This function create a filled circle/ellipse with antialias */
        function drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width=0)
        {
            if ( $Width == 0 ) { $Width = $Height; }
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $C_Circle = $this->AllocateColor($this->Picture,$R,$G,$B);
            $Step     = 360 / (2 * 3.1418 * max($Width,$Height));

            for($i=90;$i<=270;$i=$i+$Step)
            {
                $X1 = cos($i*3.1418/180) * $Height + $Xc;
                $Y1 = sin($i*3.1418/180) * $Width + $Yc;
                $X2 = cos((180-$i)*3.1418/180) * $Height + $Xc;
                $Y2 = sin((180-$i)*3.1418/180) * $Width + $Yc;

                $this->drawAntialiasPixel($X1-1,$Y1-1,$R,$G,$B);
                $this->drawAntialiasPixel($X2-1,$Y2-1,$R,$G,$B);

                if ( ($Y1-1) > $Yc - max($Width,$Height) )
                imageline($this->Picture,$X1,$Y1-1,$X2-1,$Y2-1,$C_Circle);
            }
        }

        /* This function will draw a filled ellipse */
        function drawEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
        { $this->drawCircle($Xc,$Yc,$Height,$R,$G,$B,$Width); }

        /* This function will draw an ellipse */
        function drawFilledEllipse($Xc,$Yc,$Height,$Width,$R,$G,$B)
        { $this->drawFilledCircle($Xc,$Yc,$Height,$R,$G,$B,$Width); }

        /* This function create a line with antialias */
        function drawLine($X1,$Y1,$X2,$Y2,$R,$G,$B,$GraphFunction=FALSE)
        {
            if ( $this->LineDotSize > 1 ) { $this->drawDottedLine($X1,$Y1,$X2,$Y2,$this->LineDotSize,$R,$G,$B,$GraphFunction); return(0); }
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $Distance = sqrt(($X2-$X1)*($X2-$X1)+($Y2-$Y1)*($Y2-$Y1));
            if ( $Distance == 0 )
            return(-1);
            $XStep = ($X2-$X1) / $Distance;
            $YStep = ($Y2-$Y1) / $Distance;

            for($i=0;$i<=$Distance;$i++)
            {
                $X = $i * $XStep + $X1;
                $Y = $i * $YStep + $Y1;

                if ( ($X >= $this->GArea_X1 && $X <= $this->GArea_X2 && $Y >= $this->GArea_Y1 && $Y <= $this->GArea_Y2) || !$GraphFunction )
                {
                    if ( $this->LineWidth == 1 )
                    $this->drawAntialiasPixel($X,$Y,$R,$G,$B);
                    else
                    {
                        $StartOffset = -($this->LineWidth/2); $EndOffset = ($this->LineWidth/2);
                        for($j=$StartOffset;$j<=$EndOffset;$j++)
                        $this->drawAntialiasPixel($X+$j,$Y+$j,$R,$G,$B);
                    }
                }
            }
        }

        /* This function create a line with antialias */
        function drawDottedLine($X1,$Y1,$X2,$Y2,$DotSize,$R,$G,$B,$GraphFunction=FALSE)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $Distance = sqrt(($X2-$X1)*($X2-$X1)+($Y2-$Y1)*($Y2-$Y1));

            $XStep = ($X2-$X1) / $Distance;
            $YStep = ($Y2-$Y1) / $Distance;

            $DotIndex = 0;
            for($i=0;$i<=$Distance;$i++)
            {
                $X = $i * $XStep + $X1;
                $Y = $i * $YStep + $Y1;

                if ( $DotIndex <= $DotSize)
                {
                    if ( ($X >= $this->GArea_X1 && $X <= $this->GArea_X2 && $Y >= $this->GArea_Y1 && $Y <= $this->GArea_Y2) || !$GraphFunction )
                    {
                        if ( $this->LineWidth == 1 )
                        $this->drawAntialiasPixel($X,$Y,$R,$G,$B);
                        else
                        {
                            $StartOffset = -($this->LineWidth/2); $EndOffset = ($this->LineWidth/2);
                            for($j=$StartOffset;$j<=$EndOffset;$j++)
                            $this->drawAntialiasPixel($X+$j,$Y+$j,$R,$G,$B);
                        }
                    }
                }

                $DotIndex++;
                if ( $DotIndex == $DotSize * 2 )
                $DotIndex = 0;
            }
        }

        /* Load a PNG file and draw it over the chart */
        function drawFromPNG($FileName,$X,$Y,$Alpha=100)
        { $this->drawFromPicture(1,$FileName,$X,$Y,$Alpha); }

        /* Load a GIF file and draw it over the chart */
        function drawFromGIF($FileName,$X,$Y,$Alpha=100)
        { $this->drawFromPicture(2,$FileName,$X,$Y,$Alpha); }

        /* Load a JPEG file and draw it over the chart */
        function drawFromJPG($FileName,$X,$Y,$Alpha=100)
        { $this->drawFromPicture(3,$FileName,$X,$Y,$Alpha); }

        /* Generic loader function for external pictures */
        function drawFromPicture($PicType,$FileName,$X,$Y,$Alpha=100)
        {
            if ( file_exists($FileName))
            {
                $Infos  = getimagesize($FileName);
                $Width  = $Infos[0];
                $Height = $Infos[1];
                if ( $PicType == 1 ) { $Raster = imagecreatefrompng($FileName); }
                if ( $PicType == 2 ) { $Raster = imagecreatefromgif($FileName); }
                if ( $PicType == 3 ) { $Raster = imagecreatefromjpeg($FileName); }

                imagecopymerge($this->Picture,$Raster,$X,$Y,0,0,$Width,$Height,$Alpha);
                imagedestroy($Raster);
            }
        }

        /* Draw an alpha pixel */
        function drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B)
        {
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            if ( $X < 0 || $Y < 0 || $X >= $this->XSize || $Y >= $this->YSize )
            return(-1);

            $RGB2 = imagecolorat($this->Picture, $X, $Y);
            $R2   = ($RGB2 >> 16) & 0xFF;
            $G2   = ($RGB2 >> 8) & 0xFF;
            $B2   = $RGB2 & 0xFF;

            $iAlpha = (100 - $Alpha)/100;
            $Alpha  = $Alpha / 100;

            $Ra   = floor($R*$Alpha+$R2*$iAlpha);
            $Ga   = floor($G*$Alpha+$G2*$iAlpha);
            $Ba   = floor($B*$Alpha+$B2*$iAlpha);

            $C_Aliased = $this->AllocateColor($this->Picture,$Ra,$Ga,$Ba);
            imagesetpixel($this->Picture,$X,$Y,$C_Aliased);
        }

        /* Color helper */
        function AllocateColor($Picture,$R,$G,$B,$Factor=0)
        {
            $R = $R + $Factor;
            $G = $G + $Factor;
            $B = $B + $Factor;
            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            return(imagecolorallocate($Picture,$R,$G,$B));
        }

        /* Add a border to the picture */
        function addBorder($Size=3,$R=0,$G=0,$B=0)
        {
            $Width  = $this->XSize+2*$Size;
            $Height = $this->YSize+2*$Size;

            $Resampled    = imagecreatetruecolor($Width,$Height);
            $C_Background = $this->AllocateColor($Resampled,$R,$G,$B);
            imagefilledrectangle($Resampled,0,0,$Width,$Height,$C_Background);

            imagecopy($Resampled,$this->Picture,$Size,$Size,0,0,$this->XSize,$this->YSize);
            imagedestroy($this->Picture);

            $this->XSize = $Width;
            $this->YSize = $Height;

            $this->Picture = imagecreatetruecolor($this->XSize,$this->YSize);
            $C_White = $this->AllocateColor($this->Picture,255,255,255);
            imagefilledrectangle($this->Picture,0,0,$this->XSize,$this->YSize,$C_White);
            imagecolortransparent($this->Picture,$C_White);
            imagecopy($this->Picture,$Resampled,0,0,0,0,$this->XSize,$this->YSize);
        }

        /* Render the current picture to a file */
        function Render($FileName)
        {
            if ( $this->ErrorReporting )
            $this->printErrors($this->ErrorInterface);

            /* Save image map if requested */
            if ( $this->BuildMap )
            $this->SaveImageMap();

            imagepng($this->Picture,$FileName);
        }

        /* Render the current picture to STDOUT */
        function Stroke()
        {
            if ( $this->ErrorReporting )
            $this->printErrors('GD');

            /* Save image map if requested */
            if ( $this->BuildMap )
            $this->SaveImageMap();

            header('Content-type: image/png');
            imagepng($this->Picture);
        }

        /* Private functions for internal processing */
        function drawAntialiasPixel($X,$Y,$R,$G,$B,$Alpha=100,$NoFallBack=FALSE)
        {
            /* Process shadows */
            if ( $this->ShadowActive && !$NoFallBack )
            {
                $this->drawAntialiasPixel($X+$this->ShadowXDistance,$Y+$this->ShadowYDistance,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha,TRUE);
                if ( $this->ShadowBlur != 0 )
                {
                    $AlphaDecay = ($this->ShadowAlpha / $this->ShadowBlur);

                    for($i=1; $i<=$this->ShadowBlur; $i++)
                    $this->drawAntialiasPixel($X+$this->ShadowXDistance-$i/2,$Y+$this->ShadowYDistance-$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
                    for($i=1; $i<=$this->ShadowBlur; $i++)
                    $this->drawAntialiasPixel($X+$this->ShadowXDistance+$i/2,$Y+$this->ShadowYDistance+$i/2,$this->ShadowRColor,$this->ShadowGColor,$this->ShadowBColor,$this->ShadowAlpha-$AlphaDecay*$i,TRUE);
                }
            }

            if ( $R < 0 ) { $R = 0; } if ( $R > 255 ) { $R = 255; }
            if ( $G < 0 ) { $G = 0; } if ( $G > 255 ) { $G = 255; }
            if ( $B < 0 ) { $B = 0; } if ( $B > 255 ) { $B = 255; }

            $Plot = '';
            $Xi   = floor($X);
            $Yi   = floor($Y);

            if ( $Xi == $X && $Yi == $Y)
            {
                if ( $Alpha == 100 )
                {
                    $C_Aliased = $this->AllocateColor($this->Picture,$R,$G,$B);
                    imagesetpixel($this->Picture,$X,$Y,$C_Aliased);
                }
                else
                $this->drawAlphaPixel($X,$Y,$Alpha,$R,$G,$B);
            }
            else
            {
                $Alpha1 = (((1 - ($X - floor($X))) * (1 - ($Y - floor($Y))) * 100) / 100) * $Alpha;
                if ( $Alpha1 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi,$Yi,$Alpha1,$R,$G,$B); }

                $Alpha2 = ((($X - floor($X)) * (1 - ($Y - floor($Y))) * 100) / 100) * $Alpha;
                if ( $Alpha2 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi+1,$Yi,$Alpha2,$R,$G,$B); }

                $Alpha3 = (((1 - ($X - floor($X))) * ($Y - floor($Y)) * 100) / 100) * $Alpha;
                if ( $Alpha3 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi,$Yi+1,$Alpha3,$R,$G,$B); }

                $Alpha4 = ((($X - floor($X)) * ($Y - floor($Y)) * 100) / 100) * $Alpha;
                if ( $Alpha4 > $this->AntialiasQuality ) { $this->drawAlphaPixel($Xi+1,$Yi+1,$Alpha4,$R,$G,$B); }
            }
        }

        /* Validate data contained in the description array */
        function validateDataDescription($FunctionName,&$DataDescription,$DescriptionRequired=TRUE)
        {
            if (!isset($DataDescription['Position']))
            {
                $this->Errors[] = '[Warning] '.$FunctionName.' - Y Labels are not set.';
                $DataDescription['Position'] = 'Name';
            }

            if ( $DescriptionRequired )
            {
                if (!isset($DataDescription['Description']))
                {
                    $this->Errors[] = '[Warning] '.$FunctionName.' - Series descriptions are not set.';
                    foreach($DataDescription['Values'] as $key => $Value)
                    {
                        $DataDescription['Description'][$Value] = $Value;
                    }
                }

                if (count($DataDescription['Description']) < count($DataDescription['Values']))
                {
                    $this->Errors[] = '[Warning] '.$FunctionName.' - Some series descriptions are not set.';
                    foreach($DataDescription['Values'] as $key => $Value)
                    {
                        if ( !isset($DataDescription['Description'][$Value]))
                        $DataDescription['Description'][$Value] = $Value;
                    }
                }
            }
        }

        /* Validate data contained in the data array */
        function validateData($FunctionName,&$Data)
        {
            $DataSummary = array();

            foreach($Data as $key => $Values)
            {
                foreach($Values as $key2 => $Value)
                {
                    if (!isset($DataSummary[$key2]))
                    $DataSummary[$key2] = 1;
                    else
                    $DataSummary[$key2]++;
                }
            }

            if ( max($DataSummary) == 0 )
            $this->Errors[] = '[Warning] '.$FunctionName.' - No data set.';

            foreach($DataSummary as $key => $Value)
            {
                if ($Value < max($DataSummary))
                {
                    $this->Errors[] = '[Warning] '.$FunctionName.' - Missing data in serie '.$key.'.';
                }
            }
        }

        /* Print all error messages on the CLI or graphically */
        function printErrors($Mode='CLI')
        {
            if (count($this->Errors) == 0)
            return(0);

            if ( $Mode == 'CLI' )
            {
                foreach($this->Errors as $key => $Value)
                echo $Value."\r\n";
            }
            elseif ( $Mode == 'GD' )
            {
                $this->setLineStyle($Width=1);
                $MaxWidth = 0;
                foreach($this->Errors as $key => $Value)
                {
                    $Position  = imageftbbox($this->ErrorFontSize,0,$this->ErrorFontName,$Value);
                    $TextWidth = $Position[2]-$Position[0];
                    if ( $TextWidth > $MaxWidth ) { $MaxWidth = $TextWidth; }
                }
                $this->drawFilledRoundedRectangle($this->XSize-($MaxWidth+20),$this->YSize-(20+(($this->ErrorFontSize+4)*count($this->Errors))),$this->XSize-10,$this->YSize-10,6,233,185,185);
                $this->drawRoundedRectangle($this->XSize-($MaxWidth+20),$this->YSize-(20+(($this->ErrorFontSize+4)*count($this->Errors))),$this->XSize-10,$this->YSize-10,6,193,145,145);

                $C_TextColor = $this->AllocateColor($this->Picture,133,85,85);
                $YPos        = $this->YSize - (18 + (count($this->Errors)-1) * ($this->ErrorFontSize + 4));
                foreach($this->Errors as $key => $Value)
                {
                    imagettftext($this->Picture,$this->ErrorFontSize,0,$this->XSize-($MaxWidth+15),$YPos,$C_TextColor,$this->ErrorFontName,$Value);
                    $YPos = $YPos + ($this->ErrorFontSize + 4);
                }
            }
        }

        /* Activate the image map creation process */
        function setImageMap($Mode=TRUE,$GraphID='MyGraph')
        {
            $this->BuildMap = $Mode;
            $this->MapID    = $GraphID;
        }

        /* Add a box into the image map */
        function addToImageMap($X1,$Y1,$X2,$Y2,$SerieName,$Value,$CallerFunction)
        {
            if ( $this->MapFunction == NULL || $this->MapFunction == $CallerFunction )
            {
                $this->ImageMap[]  = round($X1).','.round($Y1).','.round($X2).','.round($Y2).','.$SerieName.','.$Value;
                $this->MapFunction = $CallerFunction;
            }
        }

        /* Load and cleanup the image map from disk */
        function getImageMap($MapName,$Flush=TRUE)
        {
            /* Strip HTML query strings */
            $Values   = $this->tmpFolder.$MapName;
            $Value    = split("\?",$Values);
            $FileName = $Value[0];

            if ( file_exists($FileName) )
            {
                $Handle     = fopen($FileName, 'r');
                $MapContent = fread($Handle, filesize($FileName));
                fclose($Handle);
                echo $MapContent;

                if ( $Flush )
                unlink($FileName);

                exit();
            }
            else
            {
                header('HTTP/1.0 404 Not Found');
                exit();
            }
        }

        /* Save the image map to the disk */
        function SaveImageMap()
        {
            if ( !$this->BuildMap ) { return(-1); }

            if ( $this->ImageMap == NULL )
            {
                $this->Errors[] = '[Warning] SaveImageMap - Image map is empty.';
                return(-1);
            }

            $Handle = fopen($this->tmpFolder.$this->MapID, 'w');
            if ( !$Handle )
            {
                $this->Errors[] = '[Warning] SaveImageMap - Cannot save the image map.';
                return(-1);
            }
            else
            {
                foreach($this->ImageMap as $Key => $Value)
                fwrite($Handle, htmlentities($Value)."\r");
            }
            fclose ($Handle);
        }

        /* Convert seconds to a time format string */
        function ToTime($Value)
        {
            $Hour   = floor($Value/3600);
            $Minute = floor(($Value - $Hour*3600)/60);
            $Second = floor($Value - $Hour*3600 - $Minute*60);

            if (strlen($Hour) == 1 )   { $Hour = '0'.$Hour; }
            if (strlen($Minute) == 1 ) { $Minute = '0'.$Minute; }
            if (strlen($Second) == 1 ) { $Second = '0'.$Second; }

            return($Hour.':'.$Minute.':'.$Second);
        }

        /* Convert to metric system */
        function ToMetric($Value)
        {
            $Go = floor($Value/1000000000);
            $Mo = floor(($Value - $Go*1000000000)/1000000);
            $Ko = floor(($Value - $Go*1000000000 - $Mo*1000000)/1000);
            $o  = floor($Value - $Go*1000000000 - $Mo*1000000 - $Ko*1000);

            if ($Go != 0)   { return($Go.'.'.$Mo.'g'); }
            if ($Mo != 0)   { return($Mo.'.'.$ko.'m'); }
            if ($Ko != 0)   { return($Ko.'.'.$o).'k'; }
            return($o);
        }

        /* Convert to curency */
        function ToCurrency($Value)
        {
            $Go = floor($Value/1000000000);
            $Mo = floor(($Value - $Go*1000000000)/1000000);
            $Ko = floor(($Value - $Go*1000000000 - $Mo*1000000)/1000);
            $o  = floor($Value - $Go*1000000000 - $Mo*1000000 - $Ko*1000);

            if ( strlen($o) == 1 ) { $o = '00'.$o; }
            if ( strlen($o) == 2 ) { $o = '0'.$o; }

            $ResultString = $o;
            if ( $Ko != 0 ) { $ResultString = $Ko.'.'.$ResultString; }
            if ( $Mo != 0 ) { $ResultString = $Mo.'.'.$ResultString; }
            if ( $Go != 0 ) { $ResultString = $Go.'.'.$ResultString; }

            $ResultString = $this->Currency.$ResultString;
            return($ResultString);
        }

        /* Set date format for axis labels */
        function setDateFormat($Format)
        {
            $this->DateFormat = $Format;
        }

        /* Convert TS to a date format string */
        function ToDate($Value)
        {
            return(date($this->DateFormat,$Value));
        }

        /* Check if a number is a full integer (for scaling) */
        function isRealInt($Value)
        {
            if ($Value == floor($Value))
            return(TRUE);
            return(FALSE);
        }
}

function RaiseFatal($Message)
{
    echo '[FATAL] '.$Message."\r\n";
    exit();
}
?>